Replacement stereo for Bose System

Anyway, Im wondering what I would have to do to switch it out with an aftermarket system. Ive read different things and am hoping for a definitive answer. Is it best to just look for a stock cd player from another car? If so, what year model systems work to replace mine? I would prefer to go aftermarket, but just have to have a cd player regardless. Maybe have to think bout a cd changer but Im not sure how easy those are to hook into the stock unit as well. Thanks in advance for any answers.





