BackBeat 903+ is great. Have had them for a long time, then my wife recently broke one of the earphones, so I got a replacement used for $40. The thin cord that connects the earphones is much more comfortable than hard plastic of the MOTOROKR. Battery life is about 7 hours. Plenty loud enough. I'm wearing them right now!
I've seen Jaybird, they look pretty cool and I'd love to try them, but don't have the money right now. It's always the latest and greatest vs. older and cheaper. The obvious difference I see is that BB is larger and goes behind the ear, while JB goes completely in the ear like mono headsets. Some prefer one way and some the other.