It all depends on a few factors. What is he looking for. Is price an issue? Video is more flexible on the 7D (5D can't do 60fps), focusing is a lot better on the 7D, image quality & dynamic range is overall much better as well 5DII. They are both great cameras, Full frame sensor with bigger viewfinder or cropped body which accepts EF-S lenses.

Im my situation; I like the full frame, bigger viewfinder over the 7D and I don't need the video so I choose 5DII.

As a photographer, the 5DII is now $1999 in Canada! - a steal price IMO