Radio Help

I drive an '02 Stratus. I also own an iPod. I would like to be able to use the iPod effectively with the car, and I have options. 1) Buy an FM converter. Seems like a good idea, but experience with my friend's (I forget the model, it was a nice one even, like those that have a dock and plugs into a outlet) but the quality was poor and even with the radio and iPod cranked up, it couldn't get loud enough to be heard on interstate driving. 2) Buy a crappy, used radio with a tape deck. After using the FM converter, I tried a cassette adapter in the same car. The result sounded much, much better, accept for with it one speaker crackled all the time, plus it could get loud. The only problem is with this option is I'm afraid I will get a low quality radio. My car has a real nice factory infinity system and sounds wonderful, so I don't want to sacrifice that. Plus, if I sell my current radio, I may actually make money. 3) Buy a nice, new radio. I could then sell my current radio, which I think i could get close to $100 out of, looking at eBay prices, but does anyone know what will happen to my in-dash changer? I'm sure I would loose it's function with a new radio (If this is a dumb question, I apologize.) Could I sell it to make it work with most applicable Dodges? Thanks in advance.