As a non-pro, but discriminating 7D shooter that upgraded from Rebel world when it came out, I am thrilled with my 7D, but I am aware of its limitations. The AF alone made that a no-brainer. I have way too many kid/dog/sports shots that would be usable if not for missed focus. All the other 7D stuff was icing on the cake. That said, I unfortunately cannot claim noticeably better IQ of equally focused shots. I hate noise, I really do, but have come to live with it rather than have a nice clean image of a blurry dog jumping for a tennis ball.
This makes the 5DIII potentially the perfect upgrade for me. I'd already be a 5DII shooter it not for the AF.
Seems like a 7DII that emphasized IQ, at same MP, $1k cheaper than the MKIII, they'd have a hard time keeping then stocked.