Thanks for the advice. My 24-70 is pretty much my main lens for 80%+ of my pics and is good over almost the whole range of 24-70. (48-140 on DX). Mine is the older version and was recognised by many as one of the Nikon 'Trinity' lenses. One of the reasons I decided a few years ago on the LX100.
I don't know how good the 18-140 is at both ends of the range, but many of these zooms do display problems when used at the extremes of their focal limits. So they can be sort of limited in the full use of the, say, 18mm.
One of the big pluses and reasons for the D750 is the adjustable screen and of course the extra pixels. Plus all the body controls are virtually in the same place as the D7100.
All three of my lenses are FX.

By the way, Ive not just bid on, but as I said have bought, the D750
Cheers

My D7100 is the last DX Nikon I purchased; I keep it handy for back up and when I have need to shoot indoors because it has a pop-up flash which has saved the day multiple times. When the D850 was announced I made the quantum leap from DX to FX and went for broke. It has been my go to Nikon for several years and multiple trips to the Pac NW. I had a D780 for a short time; bought it because of its touted video capability; touted as superior to the D850. I did not keep the D780 long enough to really find out. Nikon made me an offer I could not refuse, so I got a Z 8. Just got back from a week in Alaska, had both the D850 and Z 8 with. By the morning of my third day out there my D850 was relegated to back up for the Z 8. I never thought I would ever make the switch to mirrorless; never say "never". At present I use two Nikkor FX lenses on both the D850 and Z 8; use a non VR version of the 24-70 f/2.8 and latest iteration 70-200 f/2.8 VR. I think the 24-70 on the Z 8 takes sharper pics now than when I had it on the D780. My experience for what it is worth.

First, Sony and Canon make wonderful cameras, but I'm not going to switch systems and I really do love my Nikons so please refrain from posting about other systems. I have 3 Nikon DSLR bodies. I have no objection to mirrorless except that because everyone wants them, DSLRs are at fire sale prices. I have a D600, D750 and D850. I only recently bought the D850 and as far as I can tell it's a better camera than everything that came before the Z9. And what an amazing workhorse my D750 has been! But it finally started to succumb to all the abuse from dozens of weddings, travel, and on and on. The hotshoe stopped functioning and that's vital to my professional work so sent it off to be repaired asking for an estimate to repair/replace the hotshoe and generally go over the camera and see what else needs to be done. The shop came back with a cost of repairs that pretty much need to be done, at over $500. OK. That's a lot for a 10 year old camera with 120,000 clicks on the shutter. So thinking of trading it in as is, along with the D600. But what to buy? I'm not interested in going to the Z line because I have to either do everything with an adapter or buy new Z lenses. If price were no obstacle then a Z8 would be the way to go. But price is an obstacle. $4 grand for the body only, plus the adapter or Z lenses - just can't justify the expense. So the question is should I buy a used D750 or a used D850? I prefer to shoot the D850 at 25 mp resolution so forget the resolution diff. The D750 is a lot less money and weighs a little less. But the D850 has a much better AF system and handles much higher ISO levels. Low light performance is important for weddings and my hobby is shooting at night - the milky way, light painting, etc. So handling noise is important but so is low light focus ability. I've always had a lot of trouble focusing the D750 in low light because once you lose any contrast, it can't do it. I only just got my D850 so not enough experience to know. For you D850 owners, how good is it at getting focus at night? Anyone have both a D750 and D850 that can weigh in?

First, Sony and Canon make wonderful cameras, but I'm not going to switch systems and I really do love my Nikons so please refrain from posting about other systems. I have 3 Nikon DSLR bodies. I have no objection to mirrorless except that because everyone wants them, DSLRs are at fire sale prices. I have a D600, D750 and D850. I only recently bought the D850 and as far as I can tell it's a better camera than everything that came before the Z9. And what an amazing workhorse my D750 has been! But it finally started to succumb to all the abuse from dozens of weddings, travel, and on and on. The hotshoe stopped functioning and that's vital to my professional work so sent it off to be repaired asking for an estimate to repair/replace the hotshoe and generally go over the camera and see what else needs to be done. The shop came back with a cost of repairs that pretty much need to be done, at over $500. OK. That's a lot for a 10 year old camera with 120,000 clicks on the shutter. So thinking of trading it in as is, along with the D600. But what to buy? I'm not interested in going to the Z line because I have to either do everything with an adapter or buy new Z lenses. If price were no obstacle then a Z8 would be the way to go. But price is an obstacle. $4 grand for the body only, plus the adapter or Z lenses - just can't justify the expense. So the question is should I buy a used D750 or a used D850? I prefer to shoot the D850 at 25 mp resolution so forget the resolution diff. The D750 is a lot less money and weighs a little less. But the D850 has a much better AF system and handles much higher ISO levels. Low light performance is important for weddings and my hobby is shooting at night - the milky way, light painting, etc. So handling noise is important but so is low light focus ability. I've always had a lot of trouble focusing the D750 in low light because once you lose any contrast, it can't do it. I only just got my D850 so not enough experience to know. For you D850 owners, how good is it at getting focus at night? Anyone have both a D750 and D850 that can weigh in?

"The D750 is a remarkable camera. Well ahead of its time. Beautiful image quality. Built like a tank."

Hal the D750 is a consumer grade camera which lacks the robust build of a Pro Body... I shoot the D800e and D810 both of which are vastly better designed and made... btw, the D800e is actually made in Japan... Like the Lion's share of all Nikon's Pro Level cameras... See the Lifestyle Fitness Editorial below shot with a Nikon D810 (Pro-Body)

Your consumer D750 is made in Thailand... I also lacks 1/8000 of a second and has required more firmware fixes than nearly all other consumer grade Nikon's (except maybe the "Oil-Slinging" D600 which Nikon refused to acknowledge) That is until the heat became too intense... At this juncture they had to do a massive D600 recall...

Nope, the D750 feels like a toy to me after shooting my D3x for 10 hours straight... If you are happy with your D750 good for you... I certainly wouldn't trust it on a critical client assignment... btw, the D850 is rather useless to me since it doesn't have a popup flash which I use extensively as an optical trigger for my studio strobes... besides it's bloated file size slows post workflow and I'm not about to shoot it cropped... but then again if you don't have to post process a client's deliverables in a timely manor you'll not be much concerned about workflow optimization... Oh, your D850 is made offshore in Thailand also Hal... Not in Japan.

However thank you so much for choosing Nikon as your platform of choice...
An awesome vendor with a stellar track record who's kit I've been paying the bills with ever since my Nikon F3...
All the best on your photographic journey Hal... Cheers! Thomas

First, Sony and Canon make wonderful cameras, but I'm not going to switch systems and I really do love my Nikons so please refrain from posting about other systems. I have 3 Nikon DSLR bodies. I have no objection to mirrorless except that because everyone wants them, DSLRs are at fire sale prices. I have a D600, D750 and D850. I only recently bought the D850 and as far as I can tell it's a better camera than everything that came before the Z9. And what an amazing workhorse my D750 has been! But it finally started to succumb to all the abuse from dozens of weddings, travel, and on and on. The hotshoe stopped functioning and that's vital to my professional work so sent it off to be repaired asking for an estimate to repair/replace the hotshoe and generally go over the camera and see what else needs to be done. The shop came back with a cost of repairs that pretty much need to be done, at over $500. OK. That's a lot for a 10 year old camera with 120,000 clicks on the shutter. So thinking of trading it in as is, along with the D600. But what to buy? I'm not interested in going to the Z line because I have to either do everything with an adapter or buy new Z lenses. If price were no obstacle then a Z8 would be the way to go. But price is an obstacle. $4 grand for the body only, plus the adapter or Z lenses - just can't justify the expense. So the question is should I buy a used D750 or a used D850? I prefer to shoot the D850 at 25 mp resolution so forget the resolution diff. The D750 is a lot less money and weighs a little less. But the D850 has a much better AF system and handles much higher ISO levels. Low light performance is important for weddings and my hobby is shooting at night - the milky way, light painting, etc. So handling noise is important but so is low light focus ability. I've always had a lot of trouble focusing the D750 in low light because once you lose any contrast, it can't do it. I only just got my D850 so not enough experience to know. For you D850 owners, how good is it at getting focus at night? Anyone have both a D750 and D850 that can weigh in?

The operating system and user interface of the D850 is very different from that of the D750. Since you are shooting the D850 at 25MP, I'd think about whether I'd noticed that and whether it makes any difference to me.

The D850 has some really cool functionality that is not available on the D750. If you've discovered that and if it makes a difference, I'd think about that.

There was a lot of discussion here when the D780 came out that it offered some key improvements over the D750, including in the area of AF. I don't have personal knowledge about that, but given the importance of AF to you, I'd suggest reading about it and deciding how much it might matter.

Final comment...most of the D750s that I've seen have been ridden pretty hard. I'd think about that, too.

"The D750 is a remarkable camera. Well ahead of its time. Beautiful image quality. Built like a tank."

Hal the D750 is a consumer grade camera which lacks the robust build of a Pro Body... I shoot the D800e and D810 both of which are vastly better designed and made... btw, the D800e is actually made in Japan... Like the Lion's share of all Nikon's Pro Level cameras... See the Lifestyle Fitness Editorial below shot with a Nikon D810 (Pro-Body)

Your consumer D750 is made in Thailand... I also lacks 1/8000 of a second and has required more firmware fixes than nearly all other consumer grade Nikon's (except maybe the "Oil-Slinging" D600 which Nikon refused to acknowledge) That is until the heat became too intense... At this juncture they had to do a massive D600 recall...

Nope, the D750 feels like a toy to me after shooting my D3x for 10 hours straight... If you are happy with your D750 good for you... I certainly wouldn't trust it on a critical client assignment... btw, the D850 is rather useless to me since it doesn't have a popup flash which I use extensively as an optical trigger for my studio strobes... besides it's bloated file size slows post workflow and I'm not about to shoot it cropped... but then again if you don't have to post process a client's deliverables in a timely manor you'll not be much concerned about workflow optimization... Oh, your D850 is made offshore in Thailand also Hal... Not in Japan.

However thank you so much for choosing Nikon as your platform of choice...
An awesome vendor with a stellar track record who's kit I've been paying the bills with ever since my Nikon F3...
All the best on your photographic journey Hal... Cheers! Thomas