BlueAnt Z9.
Better than Jawbone--both in size (smaller) and noise cancellation (much better).
The ability for to update the firmware (up to v3.3 now) is a bonus and should be on all high-end BT headsets to quickly address inadequacies or compatibility problems.
The auto force-reconnect issue also ensures that you'll never loose your pairing.
See my detailed review here:
http://www.wmexperts.com/reviews/blu...etooth_he.html