For quite a while I have used a 10D as my only camera. Before that, a D-30 and before that an EOS 3 and A2. I recently bought a Rebel XT, brand new, for $550. I must say it is a big improvement over the 10D in many areas, but the absolute biggest improvement I have seen in this camera, or in the Canon system, for that matter, is the E-TTL II flash system. It is much, much improved over the E-TTL system, with flash exposure errors non-existent. No under or over exposure on any of the several hundred flash pictures I have taken with it so far. Quite impressive (at least to me). Even the pop up flash gives good exposure (limited range though).

Have others had similar good experiences with this flash system, or is it just me? My exposures are dead on, and the histograms full and rich across the scale, with only slight clipping on the highlights. With the 10D, virtually everything was overexposed. I had to drop the flash power 2/3 of a stop routinely, and then use curves in photoshop to tweak the photo. Now I can use the exposre straight out of the camera almost 100% of the time.