ds
Along with the excellent above summary there are a ton of useful reviews on the internet.
I don't know the Canon specific sites but for instance Thom Hogan has reviews on all things Nikon. I am sure such a site exists for Canon.
But as gets repeated all the time here, it is not so much the camera body [with in reason] but the glass. If you get into photography
you will own many cameras, but good lenses stay with you for a long time.