Architect1776 Loc: In my mind

I agree with the 5D MIII suggestions, especially at this price it is a steal.

ppkwhat Loc: Gibsonton, FL

Out4life2016, in looking for a new camera I would start with the proverbial "do I need it or do I want it". You seem to present various reasons to "upgrade" your outfit and they are valid. Now, in looking at the lens you have and the frequency you use them, consider the additional cost for changing the lenses before you pull the plug to a Full Frame. The difference between 20 to 26 megapixels I don't think will be a "show stopper" for you to blow your photos up to a 24x36. I did that with a couple of shots taken with Nikon D-300 that I use today as a backup camera and they are in my living room wall today. The D-300 has a 12.3 megapixels. Laura72568 suggestion is one to consider. I had a 5D Mark III that I gave it to my son, since I'm a Nikon guy and was using it very little, but I liked the camera.
I did enjoy your capture - great shot!

ggenova64

Canon EOS 5D Mark III or if you wait a little bit go with the 5D Mark IV!

ltj123 Loc: NW Wisconsin

Get the 6D2! Love mine, way better then my prior 7D2. That is in my humble opinion.
Got mine last winter from ebay (gray market) for $1329 and registered it for USA warranty no problem.

ELNikkor

If you stay with crop sensor, I agree with CHG Canon that the 80D is a better choice, however, I don't think you will ever be satisfied with less than some version of the 5D.

anotherview Loc: California

Canon 6DII. I own and use this fine camera. I question describing it as a beginner's camera. See this review:
https://kenrockwell.com/canon/6d-mk-ii.htm

Toment Loc: FL, IL

Stunning! Crop frame works well. You could buy a good lens with $1500 but you probably should go with the 7Dii, if that’s what you want. Have fun!

AlfredU Loc: Mooresville, NC

Sensor size and lens quality are the primary factors for image quality. That said, the 5D MK lll would be your best choice because of weatherproofing. If not, get the 6D ll. The 6D ll has an improved AF system over the 6D, so I've read. I've been using the 6D for three years. I have read that my camera has an inferior, outdated AF system. Can't prove it by me. I personally think AF performance is a factor of user performance as much as technology. You can pick up a new 6D for $1,000 and put the rest toward good glass. I feel no need to "upgrade" to a 6D ll. But I would take a 5D lll in a heartbeat.

You are also going to like having more control over shallow depth of field with a full frame camera. Also I think the 6D ll is 24K pixels, not 26K. Either way, sensor size, not pixel count, is your best path to image quality.

AlfredU Loc: Mooresville, NC

Agreed. It may be the least expensive, smallest and lightest full frame camera on the market, but the 6D is NOT a beginner camera. Nothing could be farther from the truth.

Bugs

Because of cost constraints, about 15 months ago, after fatally baptizing my 6d in a river, I purchased the 77D, leery of the cropped sensor. Nothing to complain about, it turns out. It isn't heavy. And I have been shooting my grandson's football games in stadium lighting and have been amazed at its production in miserable photography conditions. ISO A, Tv starting in sun at 2,000, later, 500, consistently! End-zone shots post brightening, some cropping. But very usable for him, his coaches, and his buds. Shooting from the stands with Canon 100-400 old edition. Post to "Share" on LR CC (https://adobe.ly/2R4SpiN), which is an awesome function. Shoot birds, too, with it and same lens. Will soon upgrade to full frame (EOS R?). Having started shooting years ago (I'm now 78) with the Minolta SRT 101, addicted to full frame!

genocolo Loc: Vail and Gasparilla Island

For a few more dollars, you could move into the future with the new Canon R. Might want to consider.

jwn Loc: SOUTHEAST GEORGIA USA

I have owned T3I and 6D, now have 5Div. I gave 6d to grandson. Go for the 6Dii full frame for landscape and wildlife. it's the glass that makes the difference.

camerapapi Loc: Miami, Fl.

I am not a Canon users so I will simply make my comments based on what I know.

12 megapixels are good enough to make prints the size you want IF you do your job. You do not need a fast AF or a sophisticated camera with 26 megapixels to achieve that. If you have good optics, you seemed to have them, there should be no issues achieving those enlargements.
Understand that in order to have 26 megapixels to cover the size of a 35mm negative sensor those pixels have to be made smaller in size. The sensor with 12 megapixels only means that the pixels are bigger and more capable of gathering the light. Look in the Nikon line for the D3 and the D700 and ask anybody owning those cameras how do they feel about enlargements from the files of those cameras. You will have a positive answer.

You should know that for a "crop sensor" nothing beats using a lens designed specifically for that camera. It is true that you can use a lens designed for "full frame" with those cameras but the light entering the lens is only using part of the sensor while with the lens designed for a "crop sensor" the WHOLE sensor is used. Lenses for full frame work better with full frame cameras.

The question of "I want to update" is a question that is often present in the forum. In the majority of the cases, as I have seen it, indeed the update is not necessary. I cannot speak on behalf of others but my opinion is that an old camera in a majority of the cases is only limited by our abilities and photographic knowledge. By the way, none of my cameras are new and they do exactly what I want them to do and please, do not consider me an expert or that I am a great photographer because I am not.

If your present camera is not capable of fulfilling your photographic needs then it is time to update. Do not expect that a 26 megapixels camera quality wise is going to do better than what you have right now. Usually quality begins with us.

wds0410 Loc: Nunya

I'm a Canon 6DM2 user for about a year now and I am quite happy with the camera for landscape photos which is pretty much all I do. I have not experienced the focus problem mentioned but maybe because I'm not tracking fast moving objects. Dynamic range is a bit of an issue but if you bracket that problem goes away. There is something to be said for full frame sensors when capturing landscapes especially if you start cropping in post processing. I also like the tilt and touch screen system plus the GPS. So my vote is full frame no matter which of the Canon cameras you get, the mark 3 or 6DM2 but I always lean to the latest technology. Good luck with whatever you decide.

larryepage Loc: North Texas area

I also do not shoot Canon, but my suggestion here beyond what has already been said is to carefully compare the controls and displays that are provided to you and how they are laid out on each body that you are considering. (I am a retired industrial engineer, and stuff like that is very important to me.)

Are the controls similar to the layout on your current camera? Is that important to you? Do they (or can they be made to) give you quick access to the shooting parameters that you tend to change? Is anything critical located in an awkward place or where you might accidentally change something that you don't intend to change? Is anything that you currently use extensively missing?

Is the information displayed in the viewfinder what you need? Does the layout of the display in the viewfinder work for you? Does it matter to you?

If you decide to wait until Black Friday, I'd suggest downloading some (at least a couple) manuals of your candidates to scan through. Scan through them, note control and menu layout and function, and even pick a few details to compare. (You might want to do that even if you are not planning to wait that long.)

Anyway...good luck. As has already been mentioned...it looks like you will make beautiful use of whatever choice you make. And my thoughts about lenses are a little different from what has been offered above. A careful photographer like you can shoot just fine with the lenses you have now, especially since you have told us that many or most of them are already full frame lenses. You can decide later what might need to be updated or upgraded. And any crop lenses you have can be used either in crop mode or (as I am experimenting with right now) to capture images in square format (24x24mm) on a full frame body.