My first helmet was a Bell Sport II which was very nice and served me well. The only problem was getting one to fit, as they are not sized numerically, they are SM, MED, LRG, XLRG.

My current helmet is a Bell M2 FA, which I love. Better sizing resulted in a fit far better than I expected, and I can wear my glasses without any trouble. Don't even notice that I'm wearing them. I also like that Bell has a nice selection of visors, even for the lesser priced helmets. I wanted a blue iridium to go with the paint scheme on the helmet, and was quite pleased to find that Bell supplied one even though my helmet was not from the higher-priced line.

Another consideration for those who feel pressure on the forehead later in a session. Check your balaclava. I used to wear a Simpson, which had stitching and a seam around the eyeport. Well the seam, together with the fit of the helmet, would drill right into my forehead. I switched to the Sparco single eyeport with no seam and the problem is gone.