I've had my Canon 10D for about 2 weeks now and I used it with the following Canon lenses: 24-70L, 16-35L, 100-400L IS and 35-135 IS. The results have been nothing short of stunning. Love that 1.6 mag factor when shooting wildlife and my children playing baseball.
I've had a few mis-focused shots, but I'm think that it was more me and not the camera.
I'm so impressed with the 10D digital quality and no shutter lag, that I sold my Canon Elan 7E 35mm body on eBay. I'm keeping my Canon EOS 1VHS, for now, at least until I use up the Fuji Provia film in my freezer.
I think that eventually I will spring for a 1Ds when the prices come down a bit. Then I will sell the 1VHS.
The unfortunate part of digital is that now my cameras fall into the same obsolescence cycle as my PC's. It took me 20 years to replace my first set of Canon Ftb and F1 bodies. It might make sense to lease the bodies instead of buying them. but that's hard to justify for a hobby.
Regards,
Bud