The Rebel, as Bob stated, is missing certain "pro" features, but you can get around that. The Rebels also have sloppier controls that are harder to use under many conditions. However, since you want it for studio work, you will not have to cahnge the settings much, except for ISO, Shutter, and Apeture settings, which are not as easy to adjust as other Canons--but big deal.
Although similar, the 20D does have a different sensor chip.
You can see a comparison bet2ween the two with images here:
http://www.dpreview.com/reviews/canoneos350d/page23.aspAs for a lens, on my 20D I use the 24-70L 99% of the time, and it allows me to get within 11 inches of the subject and the zoom is nice too. The effective zoom is 38.4-12, wihch you can see is a nice range. To get down to around 31mm effective, you'll incur a BIG hit in max zoom with other lenses.
I think the Rebel XT has a 200 sync rate, which is the same as the 5D, whereas the 20D has 250. The pixel load of the XT is 8.0 compared to 8.2 for the 20D also.
If you want the camera for all jobs, including studio work, the 20D hands down. If you want it only for studio work, the RebelXT is a good choice to save money and possibly get near the same quality images as the 20D.
QUOTE(Hank @ Feb 1 2006, 03:37 PM)
The suggestion to consider used equipment is an extension of your original question, but a good one. We have had exceptional results with
KEH, and there are other reputable sources.
Following up my recommendation for a used Fuji S2 and Nikkor 35-70 f/2.8, KEH is currently asking $789 for an S2 and $310 for 35-70 f/2.8 (both in Excellent condition, and KEH's ratings are very honest). That's simply a whole lot of excellent image quality for not much money, compared to new prices for the latest models. Look up the prices for Peripatetic's recommendation, and I suspect you will find similar savings and great value in terms of image quality delivered per $.
Hmmm. Those prices are so good for the S2, perhaps it's time for us to grab another for backup.