I use Plantronics Voyager Legend, works well when fully charged. Sometimes when only 3 of 7 hrs of talk time remaining, has a hard time staying connected. WAAYYY better than Jawbone Icon or Era!
They're all pretty much the same, it's more about what you want out of a headset.
I like listening to media on mine so a2dp is necessary. Comfort wise, the plantronics savor m1100 is best for me, the the plantronics voyager pro lasts longer.
I used to like BlueAnt but the earbud rotates too easily and kept falling out.
I have the BlueAnt Q2 bluetooth from verizon. I like it. I can hear everyone clearly and they can hear me no problem. The only thing about it is that the buttons on it are small.