^^^^what he said (and an earlier poster) - if you're after a lower-to-mid range DSLR then any of them are more than good enough, and you're best going with what fits best in your hand, looks best through the viewfinder and works with the kinds of lenses you're likely to want to use.
Another thing you might want to consider, if you're really trying to save the pennies, is to look for an "obsolete" model with little-to-no presumed value on the used market. I'm thinking of "old, obsolete" roughly 6MP models. The one that springs immediately to my mind is the original Pentax K100D (not the super) though I don't know what current market perception of that model may be. I do know that I have photos on my wall at A3 (roughly 11"x14" size) that are more than just "good enough", taken with my Canon 300D, which is considered so passe that I doubt I could sell it no matter what the price, or even give it away.
Buy one like that and you'll have more to spend on lenses, which "last" longer (in a market sense) and will have more impact on your overall image quality anyway.
...Mike