What are the pro's cons to buying an aftermarket FM modulated Cd changer as opposed to the Bose factory changer? I can save about $120 dollars buying an FM 12-disc over the 6-disc bose? I know that the bose will work with my deck, and i can use those functions, but it there a big difference between hardwired and FM changers? Any replies are appreciated, unless you are flaming of course...