http://www.bestbuy.ca/en-CA/product/.../10277470.aspx
Bluebird X or X2. I don't have them myself, but it seems it's one of very few that many audiophiles will suggest if bluetooth is a must.
Sound is good
Can take calls
Comfort fit and tight fit
Sweat proof (with warranty... lol)
Great for use when working out.
Battery life 8 hours, should be enough?
Should be able to wear only one ear, but i haven't actually tested myself, sorry.