I really like the Mirage headset from Plantronics. The clip behind the ear is really smooth and comfortable and because the speaker rests so lightly on the outside of the ear rather than actually in it, it's comfortable all day. The sound quality is good, compared to other headsets that I've tried - but Plantronics units all seem about the same anyway.
When you've got to wear something on your head all day - you'd better make sure it's comfortable! The Mirage works great for me.
Danielle Westcreek
Haynes
Ormond Beach, FL