Thanks for the update. I have worn a Shark Evoline since July 09 and really like it. I sent it to J&M to install their wired premium headset and then went on a 6000 mile trip. It works great. I use a Zumo 550 and the Jim Bissonette BOMM piece to utilize my phone when paired to the Zumo on my 06 FLHTCUSE. Sound on the headset is pretty good. I also have a Shoei full coverage helmet with a Midland BT2 bluetooth headset to ride on my other bike (BMW 1200 GSA) pairing it to the BMW Navigator IV (BMW's version of a Zumo 660). I'd have to say I prefer the Shark helmet for its flexibility, opening chin guard and almost no wind noise over the Shoei, but find the sound and fidelity of the Midland headset speakers a little better. I looked at the Nolan but chose the Shark due to the ability to ride with it open faced. Also have found the Zumo 550 on the Harley to function better using the wired phone and music setup than the bluetooth setup on the BMW, as the Nav IV system isn't very stable using bluetooth phone and music simultaneously. This seems to be a common problem from reviews on the Zumo Forum. I've been interested in this thread because I'd like to use the Shark as my only helmet for both bikes, use my Zumo 550 switching it from bike to bike, and find a bluetooth system that will work reliably. A issue though in using the Zumo 550 with a bluetooth headset is the 550 doesn't transmit music in stereo, while the Nav IV (Zumo 660) does. So.... I have a fair amount of dollars invested already in all this but don't have a perfect solution yet. The new J&M setup sounds like it might solve my problem but at $329 for the dongle, $249 for a harness, and $299 for a headset, I would be ditching the Midland BT2 headset, the wired J&M headset, and a Shoei helmet - all of which cost almost as much already. Maybe I just need to turn them all off and just enjoy the bike again!