I use the Blueant Xe micro and I love it. The only issue I have with it is that the ear hook gets loose after time, and tends to fall down instead of staying in one position. Fortunately, the X3 micro comes with a spare...and you can also buy a pack of four for around $10.
The X3 micro doesn't have the annoying echo feedback when talking to someone that most of the other bluetooth's I have owned do.
Overall, an excellent headset for a great price.
Check out
www.pricegrabber.com to find a good deal on any bluetooth headsets...I got mine for $38.