I went with the parrot system it ties the entire phone with bluetooth to your cars radio and allows you to take calls make calls play stored music or streem your favorite app mine being Pandora. And best of all it ties to your existing radio with a harness at additional cost. But well worth it. Hope that helps. And your question about aux vs fm. Aux wins every time. You will never get bleedover like you get with fm. Good luck
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Could you link us to where you found this Parrot device? Also, I presume since you say, "at additional cost" they must offer particular harnesses for specific car radios? If so, how do you find those?
This seems like the way to go so as to not have to tear-out the existing stereo. Although, it would seem like you still have to do some disassembling in order to get to the back of the radio to hook up the harness. But at least everything would look stock. Also, the FM Transmitters usually stick in to the cigarette lighter and in some cars, that just clutters-up the console. (and by "some cars" I mean mine)
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