I have used an old Plantronics Voyager 510 for awhile now and I have yet to find another decent Bluetooth headset that was anywhere near the quality of sound and noise-canceling performance as the Voyager series.
On the whole, I think I can seriously say that I owe my life to my Voyager. I know a couple of people who have had car accidents due to talking and driving, because of my voyager I have not had that trouble.