Don't know how much you were wanting to spend or if you want an aftermarket CD player in your car but I went with the Sony BT2500 Bluetooth CD player and have absolutely no regrets! I tried some of the FM transmitters and I got crappy audio quality (fuzziness, etc) so I decided to take the plunge on this.
Pretty cheap now...
http://www.crutchfield.com/App/Produ...earch%3dbt2500