hello all, I'm attempting to make the transition from P&S to dslr, but i don't know very much about photography. i'm looking for advice on a good starter dslr. my biggest need in one is a high resolution, because i'm an architecture student and most photos i take are of buildings and various details (some very small). So i would like to be able to have images that i could blow up pretty large and still have good quality. also, as a student, i'm on an extremely limited budget (shooting for $500 max, but that may be wishful thinking). thanks for any help you can provide.