A friend (who also rides) loaned me his
Plantronics Backbeat 903+ Bluetooth Stereo Headset to try out.
I've use this for a few days and this looks like just the ticket. Sound quality is good and I was still able to hear the music while running at 70 (+

) MPH with my EMGOs.
The design is comfortable (after you get them adjusted right) and work well with my open face helmet with shield. One thing I like about them is that they stay in place and don't shift when putting on or removing your helmet. The other thing is that the ear bud portion does not completely seal your ear off so you can adjust the volume and hear back ground noises.
The other thing I like is that they have a 7 hour run time and a quick touch of a button will give you a voice command of remaining run time.
I used them last night on my way home from work. Took the "long" way home with the music player running and also my Navigation. Navigation directions over road the music when coming up on turns then the music resumed.
Stopping in my regular watering hole on the way I was able to remove helmet, turn down volume so I could talk to people while hydrating and then when leaving up the volume and put on my helmet all without touching the set (used phone controls).
Best part is that these can be had for < $50.