Owned and used the Motorola S9, and was fortunate to get a JayBird unit (JB200m), and have to say, they are the best on the market. They offer true sweat protection and are highly durable. I actually had my pair run through a snow-blower (true story), and they worked fine after. Bluetooth Headphones Wireless Stereo Headset Headphones : Wireless iPod Nano Touch Headphones : Wireless Computer Headphones : Mp3 Bluetooth Wireless Headphones : Jaybirdgear.com
As for Bluetooth car clips, I have used the BlueAnt SuperTooth, Motorola T505, Jabra SP700, Parrot MiniKit. The T505 and MiniKit were tops and failry equal, while the others did not produce the same audio quality.