"If it ain't broke, don't fix it--that seems to be Canon's approach to its EOS 30D, the follow-up to its perennial favorite, the EOS 20D. Aside from a few performance tweaks, the Canon EOS 30D is the same camera as its predecessor. (For complete details of the 20D/30D, read the EOS 20D review; in this piece, I address mainly the enhancements that differentiate the 30D.) It has the same well-balanced, magnesium-alloy body with its intelligently laid-out controls; an almost identical set of pro-level, extremely customizable features; and roughly the same, excellent performance. Also, thanks to the identical 8-megapixel CMOS sensor and image-processing system, it yields the same superb photos, especially at high-ISO sensitivity settings."I think we have discussed this subject in quite some detail, but here is a nice C|Net review confirming what we knew. I still think the 30D rocks, but it is pretty clear that the Nikon D200 has pulled ahead a bit.