[Compusmurf]

Ok, I've tested tons of BT headsets and here's my opinion.

Jawbone ICON. Works well, esp with Vlingo, good sound both receiving and sending. Fit can be troublesome with folks. Battery life, under 4 hours talk. One of my favorites.

Plantronics Voyager Pro/Pro Plus. Pro and pro plus are physically the same size, pro plus adds a2dp audio. CAN be uncomfortable with some ears, horrible for folks that wear glasses. Battery life is astonishing.

Blueant Q1/Q2, nice headset, both are great sounding. battery life under 4 hours use. Fit can be troublesome as well.

Motorola S9. Receive audio was good, transmit was troublesome. Fit is horrid for some folks, too much pressure, to tight, etc. Battery life good. Stereo.

Plantronics 925. Good audio. Battery life less than 3 hours. Fit can suck.

Plantronics 975. Same quality as the Voyager pro, no behind the ear bulk. Battery life less than 4 hours. One of my favorites. Fit can be troublesome with some ears.

What to avoid.... Things like the "odd brands"/"cheap brands" like Coby, Rocketfish, Hello Kitty, Samsung, Looxcie, some cheap Motorola's.

Honestly, you usually get what you pay for when it comes to audio quality (except for maybe the new Bose one.) The top 3 in the BT headset world are Plantronics (who've been doing voice headsets longer than many of you were born), Blueant and Aliph (Jawbone series)