I have been using the "RP" for almost two weeks now. The only problem I have had which isn't a problem has been getting used to the EVF. The blackout between shots still freaks me out but I am getting a hand on it. I have used every lens I have on it which includes a Sigma 50mm f1.4 without a problem other than I had to turn off all camera corrections when using the Sigma. I have been very pleased with my results so far but I am still testing it out in various ways. I have shot almost 300 pictures on the first charging of the battery. Battery life has been somewhat of a surprise to me. I expected worse. I only have two ef-s lenses which I use on my 80D. The RP automatically crops both lenses which results in images between 10 and 11 megapixels. Still, the fact that you can use these lenses without a vignette problem on a full frame camera is a plus. I just purchased the RF 35mm F1.8 lens in keeping with the smallish size factor as well as price. I will let folks know how it goes as I expect delivery of said lens this tuesday. The bottom line for me is I call the "RP" my baby "R". If you like the Canon "R" you will like the Canon "RP". No ifs, ands, or buts.......

LP - based on your lenses, going FF will generate a need for more lenses unless you're prepared to live with just your 70-200. Of course, you can sell your EF-S lenses along with the 7D. If you're (very) lucky, you'll get around $800 combined. I looked through your image posts. A mixed bag, with the good stuff being really good.

I made the 7D to 5DIII move. It's a great camera that I'd recommend to anyone with the caveat that if you don't have the glass for it, you're wasting your money. Or even more likely, you're going to be buying some / a lot more lenses until you're going to be happy.

I was serious: you're doing good work with your current gear. The 5DIII is going to let you shoot to ISO 6400 when you have to and the noise in these images cleans up easily. Although the 7D is advanced in AF, the 5DIII is even more so.

As I said in another post, UHHers will gladly spend your money like sailors on leave ... You keep asking for advice on a decision you seem to have already made. If you're still looking for the "right" move, get some FF lenses before a FF camera. The 17-40L would be a good choice for the 7D and your current lenses replacing one or both the EFS mounts. A used one (EX rated) from KEH is relative steal in terms of quality vs cost.

Added - also consider the EF-S 10-22. Having had both the 17-40L and the 10-22 at the same time with the 7D, I can tell you image to image, you cannot tell the difference between the lenses on the camera except where the focal lengths do not overlap. If you move back to your earlier question of new lens ideas, consider either of these.