I wanted a good solution for playing audio through my car stereo and read good reviews on the Motorola t505 bluetooth speakerphone, which has a built-in FM transmitter so I can play everything through my car stereo (in a fairly high radio-traffic Fort Lauderdale area). I was sceptable but picked on up at Best Buy for around $75 and it has worked great with playing my mp3's and streaming DroidLive and various other stuff I have installed. It is also a fantastic hands free bluetooth speakerphone (the people I call don't even know I am using a speakerphone). I do have a fairly critical ear (been playing keyboards professionaly for more years then I would like to admit) and it does sound great (reduced all my MP3's to a 128 bitrate to save space on my SD card). I am sure that there is better fidelity using more complex solutions but the Motorola is portable, connects to my Droid with no problem, and more then gets the job done. And I can use the buttons on the 505 to pause, foward and replay tracks with no problems.