+1 for the Nolan N90. Shortly after getting my '12 2/3 Adventure in July, I went down to Revzilla's store in South Philly for a new helmet and riding jacket. With the help of a terrific associate named Kat, I tried on several helmets from various manufacturers. The N90 was the only one which fit well, so I bought it. This was my first venture into anything other than a half or 3/4 helmet-and any other bike other than a cruiser-and I had some doubts as to whether I would like it or not. It took a little getting used to, but I don't think i'll ever wear anything other than a modular/flip-up helmet again.
Noise level is ok, especially when considering the half helmet noise level I was used to. Already having some hearing impairment and wanting to prevent more, I always ride with earplugs and that helps. Many all day rides confirm this for me.
I wear glasses, too, and it can be a bit tricky with the N90. I don't take them off to put the helmet on and sometimes I have to adjust the placement of the glasses on the bridge of my nose. I find that putting the glasses a little lower on my nose helps a lot and doesn't hinder my vision at all. The pain from the pressure of the helmet on the glasses was substantial after a while. Now that I know how to deal with it, it's a non-issue.
As stated by other posters above, the fit of the helmet is most important. There are ways to tweak the bike to minimize the wind noise.
Hope this helps.