Go to Ken Rockwell's site for definitve info on all these. I will get the 6D based on his input, my first digital after a long velvia/zeiss marriage. Ken was in the industry developing hardware and software for color digital, and now is a full time reviewer. If its not good enough, he tells us, if its superior, you get to know.
I really hope you are trolling or kidding.
Canon 5D MKII, Canon 17-40mm F/4L, Canon 50mm 1.8 II, Helios 44M-4 58mm F/2, Sigma 105mm EX DG Macro F/2.8, Tamron SP 150-600mm F/5-6.3 Di VC USD, Canon 200mm F/2.8L, Yongnuo YN-560 II, S100 with underwater housing