5D Mark II is gangsta.... when i get 2k i can blow it will be mine.. 21 mega pixels and 1080p Video ... i love Canon... but my dad is a pro photographer and he uses Nikon
but like that the great phototini said, when you are looking at the these two brands you have to see what feels good in your hands and what menus you like.
Haha, yeah that MK II is a sweet camera, the 21 mega pixels is way more than I or most photographers need though. But it's always nice to have more room for enlargement than not enough. The video is another SWEET feature it has, I have seen some video's done with it and I must say I was amazed it came from a still camera.
The downside, well for me personally is the layout of the function buttons and dials. I am just not comfortable with the way canon lays their camera's out. I also am not a big fan of the menu system, although they did do a much better job on the MK II's menu system than on the old 5D.
I started out a canon shooter, mainly because I needed the full frame sensor of the old 5D, and Nikon did not have a full frame in my price range at the time. But once the D700 came out I went and looked at it, and after about 10 test shots in the camera shop. I traded all my canon gear in on the D700 and two lens'. And I have never looked back.
The camera is nothing but a tool to help you recreate your creative vision. No camera or brand of camera is going make you creative or take good pictures. A good fundamental knowledge base of photography is necessary to take your vision and turn it into what you want others to see.
From the OP's post it sounds like he has the basic knowledge at least from back in the film days. But this post was made in general terms for anyone looking at SLR cameras.