You can't go wrong with either camera. The 5D MkII has the edge on IQ and the 7D has the edge on advanced technical specifications.
I chose the 7D and I am going through some AF problems with it. I've sent it in to the Service Centre and have every confidence that it will be resolved. That is not to say that every 7D has AF problems. I believe that only a few have been affected and they appear to be related to a subset of the "first" batch that Canon sold (at the end of September and beginning of October). The other 7D related problem .... ghosting, appears to have been resolved with today's announcement of Firmware release 1.1.0.
The 7D is truly a technical marvel. I've used a non-affected 7D, one that worked as advertised, and I found it a joy to use in all modes! I've also used the 5D MkII and can only say that I wish there was a camera that merged both features of the 7D and 5D, say a full frame 7D.
Regardless of the choice you make, I am sure that the camera will bring you years of enjoyment. Good luck with your decision.
well said. thanks!
