So you'd figure with Snow Leopard that sound quality with some a2dp headsets would be better -- turns out it isn't. I was able to 'fix' my sound quality with a Motorola S9 by going to Bluetooth Explorer (option-click on bluetooth to find it) and going into Utilities->Special Options. I changed the bitpool minimum to 40 and the sound quality is MUCH better. Sounds like its a problem with negotiation between this headset and OSX. If you set the value too high OSX will let you know that the headset rejected the codec settings. I'd figure that 40 is ok for me, but might not be ok for others -- use this at your own risk.