Every October I go to Montana with a group of still photographers to shoot stills of trains (my hobby)...three of the people I go with happen to be Canon tech reps. So I got to test drive the new Canon EOS 5D this year and absolutely loved it the minute I picked it up.
A bit pricey at $3299, but I like the idea of a full-frame sensor and the fcat that my favorite Canon lenses (17-35, 28-70 and 70-200) would retain their focal lengths on a full-frame camera.
I'm testing a 20D and that wide-angle (10-22, I think) on a four-day junket to Eastern Canada this weekend and will be excited to see how that setup works.
I just got a new computer, so the new still camera will have to wait a few months. I still enjoy shooting film (Canon EOS-1vHS) but love the instant gratification of digital and the oustanding imagery in less than stellar light.
Another factor to consider with digital cameras is ease of repair. Canon has a factory service center nearby and gives pro users 2-3 day turnaround on repairs. Have you investigated ease of repair in your neighborhood?
Out here, among professional shooters, Nikon is a sinking ship. Virtually all the pros I know are longtime Canon users or recent converts. I think there's one Nikon user left at the LA Times. An earlier poster speculated SI shooters were influenced by something other than quality to stay with Canon. The fact is SI doesn't care what kind of cameras the shooters use...most of them are freelance and own all their gear anyway. I would think that people whose living depends on the quality of their images, day-in and day-out, would be pretty good judges of who makes the best stuff these days. Go to any sporting event and the majority of lenses on the sidelines are white (Canon).