You're stuck with the FM modulator, it won't work as a changer in any way. If you're concerned about sound quality, just make sure it's a GOOD modulator by a reputable company (Clarion, Alpine, Pioneer, etc). The cheap Radio Shack types suck as they are full of noise and sound terrible. I used a Dephi FM mod for my XM radio in my old vehicle, and it sounded pretty good - certainly good enough for watching movies or listening to the radio! Shop around and you'll find a good one that sounds decent, and it won't cost you a fortune to do. Make sure it has at least four frequencies to choose from, any less and you may have problems, especially if you live in a metro area with lots of FM stations.