Personally here are the main reasons that I would spend the extra cash.Smelly said:holy freakin' thread deterioration...
I'm considering buying a D-SLR in the not too distant future, so I'm wondering the same question as Narlus, which has yet to be answered. Is the D20 worth a few hundred bucks over the Rebel XT? If so, why? If not, why?
Mag. body is going to survive more abuse, droping, kicking, ect.
Better more ergonomic placement of buttons, so you get fewer missed shots because you're fiddling with settings
The faster fps. to me is a big plus
Another consideration is shutter life, the 20d is rated to 50,000 actuations I don't know the rating on the XT. I do know that sveral of my freinds shoot 20d's and have surpassed 70,000 shots without issue.
If you think that these will be helpfull traits on your camera then it is worth the cash, spending more initialy is always cheaper than upgrading later.