I went ahead and bought a G4 set from the board sponsor. With the HF10 discount it was cheapest I found. Still trying to figure everything out. Ipod plugged into unit with wire sounds good. FM radio appears to be useless as far as sounding good.

Biggest problem (disappointment) so far is I can't get G4 to pair with a Garmin 765T. They both support A2DP, but after searching and reading there doesn't seem to be much positive feedback. Garmin lists the 765T along with the 660 and 550 zumo's as supporting BT headsets. Not sure if its a garmin or scala issue.

Haven't tried the B2B or intercom yet, I'm waiting on second helmet to show up. The G4 installs with the clamp system on a HJC IS-33 helmet perfectly. Less than 10 minutes with a break.

Can someone shed some light on pairing with a GPS other than the Zumo?
Mike