Motorola S9 headphones and Motorola T505 speakerphone/FM transmitter
I've had the headphones for a while, and just got the T505 a week ago or so.
Handoff between the two is nearly seamless once you get the timing right. Shut off one, then turn on the other.
I just ordered a clip/mount setup for both my cars from Proclip - I should have them soon.
Oh, you said low cost??!?!?!
Buy any cheap FM adapter and use the USB to stereo mini-plug adapter that came with your phone. That should work for music, for phone calls just grab a cheap bluetooth headset.
There's one on
http://www.woot.com/ right now for $9.99
__________________
HTC Mogul w/Sandisk 8gb class 4
Sprint : $40 1000m (7pm)N&W 500txt, $10 Power Vision w.Nav, $7 Replacement Warranty.
Seidio : 3200mah, screen protector, holster, and bad customer service
Motorola : S9, T505
Proclip : Mogul Mount, move clip system, WRX & 350Z Dash mounts