Is there a reason why you are only considering rebels? You can get a really good condition 40d possibly even 50d for the price of a t2i 10mp is enough for most photographers unless you are printing banners of your pictures
http://www.amazon.com/Canon-60D-Digi...0153272&sr=1-6
There you go brand new for 999.00 with free shipping. I think that is worth the extra investment and you may find a better deal on a 50D, 60D ,1D Mark II or even 5D Mark I or 7D if you shop around. I would stick to those personally over a 450D or a 550D
I still use a 30D and have no reason yet to upgrade. Its the lenses I am upgrading right now not the camera.
50D with a nice beginner lens I would choose the 3rd used one with 45 feedback
http://www.amazon.com/gp/offer-listi...condition=used