BlueAnt Q1. Works well, New firmware supports Voice Navigation et all. Always been a bit low Volume for my liking, but sound quality is excellent. Comfortable and stays put OK. Reads caller ID's to you which is a personal taste issue for some.
Jawbone Prime. Works OK, I am not a fan of the JB design (I hate buttons that aren't really buttons. Sound is LOUD but a bit metallic (much like other Jawbones. ) I haven't tried the newest one. This is my back-up/loud environment headset.
And I have a drawer full of Plantronic Voyagers. My favorite headset of all time. Comfortable, loud and clear and almost impossible to to knock off your ear (even with glasses). Unfortunately they suck at multipairing and are a bit, err oversized for 2010 LOL. I haven't tried to pair them with the Inc, but I don't imagine there would be any issues.