Yes, the Canon body may feel better in your hands but....the focus is off. I've lost many potentially great images with Canon but in the end made the switch and am delighted I did. Yes, the ergonomics of one may be better than the other or whatever but the resultant image is the key. I've started slowly and am still renting and testing before buying used lens here (from people who take great care of their gear) and I'm not regretting it in the least. Both systems have their pros and cons but unfortunately, Canon still needs to perfect their autofocus and tracking.
Good luck - after the 40D Canon lost it. If you've taken care of your lenses the benefits of the change will outweigh the losses.
I'm not a fan of microfocus to be quite honest. A Canon service pro told me that you shouldn't have to microfocus anything. I did play around with it but the focus inconsistencies were all over the place. Front focusing on the far end, back focusing on the close end.
I'm also not basing this decision on one model, in this case, the 7D. I'm basing it on the fact that I've never been happy with the focus systems. Sure, I can take pictures... but I'm always feeling like I'm working around the camera rather than the cam working for me.
If anyone wants an entire Canon kit.. lemme know. :-D
You know its funny how psychological equipment could be. I was a canon guy for the longest time. I loved my 400mm F5.6 and my white lenses. Once I got a Canon 300mm F2.8 IS, I couldn’t really carry around the 400mm F5.6 even though it was one of the best lenses for the money I ever owned. When I went to Nikon and all my lenses was black, I felt strange. Felt like I had to have a white lens. I found a 300mm F2.8 AFS here on the forums for sale and it was a rare “White” one, so I bought it. I felt so proud having my white lens back. Then realized how much I liked the Nikon equipment and sold it to get the VR version. Oh and its black. I don’t have white lens envy anymore.
Oh and this is me shooting with my Nikon 300mm F2.8 AFS "White"
I found a 300mm F2.8 AFS here on the forums for sale and it was a rare “White” one, so I bought it. I felt so proud having my white lens back. Then realized how much I liked the Nikon equipment and sold it to get the VR version. Oh and its black. I don’t have white lens envy anymore. 
