The Poly Voyager 5200 headset has epic noise cancellation! It's great while bicycling except it doesn't fit in my ear over or under my eye glasses! Check out my very mundane monologue :-) Revolver to Clark Park.
@roland That's incredible noise cancellation - bar 3-4 moments (close passes, hills, wind going downhill) I would have assumed you were at home in peace & quiet. The actual BT voice quality dropped a couple of times near the end, but noise cancellation was still solid.