I use LG hbs-700 bluetooth stereo headsets. Best buds in their class I have found (I will never buy a mono bluetooth set).
They are comfortable, sound great, can transition easily to mono or stereo listening as the ear pieces store via magnetic clips on the set when not in use. The battery easily lasts me all day with heavy use as well. And the best part is they go for only $40-50 on Amazon.
The set has buttons for ending/receiving calls (that also activates voice dialing!), volume controls, as well as music play back controls ( pause and seek buttons). My only complaint would be how android handles these controls...the only apps I have found the pause/start button to work correctly is in the stock music player and Google music app (not third party apps like podkicker, for instance).
If pure sound quality is what you are looking for, then I wouldn't buy ANY bluetooth stereo headsets, but for shear convenience, awesomeness, and a good balance in sound quality, the LG hbs-700s can't be beat (imho).
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