My brother sycomoto has a nolan that he finds a bit noisey also. Has had some problems with the coms unit to in that it keeps cutting his MP3 player. He looks an idiot as he's riding down the road smacking his head to try and get it sorted. I don't know of any of these style of helmets that are really good. Even the stsyem 5 has problems if this site is anything to go off and that's £500 for the bluetooth jobbie.
If you buy one don't expect too much and you won't be disappointed. I'm still looking for the right one for me and suffering my minging old Arai quantum e. Watching this thread to see who's got the best solution.