Since I'm a Canon guy I'd recommend the used 30D over the new XSi if you've handled it and it fits your hand; but that's just a personal thing.
You're getting way too caught up specs that will likely never matter to you or your images. None of those cameras would be a "wrong choice." Pick one and move on.
You're getting way too caught up specs that will likely never matter to you or your images. None of those cameras would be a "wrong choice." Pick one and move on.
