Hmm thanks guys...this is all helping alot. Honestly the main reason the 20D is staying in my thoughts are the 5 FPS burst mode and getting it used at a decent price with most things I'll need (Batterys, tripod, ect.). But the XTi seems like a pretty good camera and the only major flaw being its size...which odly enough, is because its to small.
So heres a tricky one...What are the differences in the XTi and XT? The XT I can get alot cheaper and get a good flash and lense but I'm not sure. And how big of deal is it to have that fancy sensor cleaner? I have no idea what difference that will make for me. (I'll be shooting alot this summer in dusty and dry places, if that matters?)
Thanks again for all the help guys, I'm taking everything into consideration.
EDIT: Also, is a pack like this decent? This one
The size deal isn't so odd when you consider that those of us complaining about it are used to lenses that weigh twice what that camewra weighs or more. The heavier body helps to balance things out, besides being much more tough.
The XT is essentially the same camera as the 10d, with a plastic body. The XTi is essentially the 20d. They lack a few other feature, but as others have said, you won't notice them right away, and possibly at all if all you really want to do is get some decent shots. If you start to experiment with certain things, you will notice.
Those fancy sensor cleaners don;t do much. They vibrate the sensor, which knocks off SOME dust. IT falls into the sensor box and usually ends up back on the sensor in not too long. I have a $4000 camera body, i wipe the sensor with a pec pad on a spatula and some special cleaning solution. It isn't a big deal as so many people make it out to be, it just takes common sense (ie: don't push so hard that you scratch or break the low pass filter).
None of the cameras mentioned have weather sealing, so that isn't an issue. The only ones that would is the 1dsmk2 or the 1dmk2 (which are $8000 and $4000 respectively).
edit: those lenses in that kit (and most of those kits actually) are complete crap. Don't waste your money. get a body and kit lens or 50mm 1.8. Save, get something nice. Camera bodies come and go, glass is an investment.