I'm not trying to be a smart-***, but this is what I use.
http://www.bestbuy.com/site/olspage....=1197678340151
This head-unit works flawlessly. It will fast forward tracks on the phone by pressing buttons on the unit. It supports multiple bluetooth devices at one time. It has an external speaker for calls. Caller ID on the unit.
The only thing I haven't tried yet is to get Tom Tom 7 to come thru the speakers while I'm listening to music.
I know there's a lot of skepticism about the bluetooth stability, but I drove 600 miles (NC to PA) listening to music off my phone and never had an issue. It's worth the money if you have it.