Unless you're going to be doing large prints of your photos I think you'd probably be fine with the XT. That being said, I have an XTI and have been happy with it so far, although sometimes I find myself wishing I'd spent a little more on a 20D instead. But so far it's been great, and with the right lens you can take really good pictures with either. For a good answer you might want to try looking around at http://photography-on-the.net/forum/
, I know this has been discussed several times over there.