Help picking out my car audio system?

Well, your not going to get a full car audio setup for under $500. Buuuttt, my suggestions would be, aplipine or pioneer(for stereo), rockford fosgate or memphis (for subs), rockford fosgate makes great amps but they're a bit on the expensive side unless you go for the cheaper series which is fine too. As far as speakers go, i would go with polk audio or infinity