Agree with TrackRat completely. I was all set to get an HJC but found it was too narrow at the top of the helmet. I'm no cone head. Then I was trying the sized Bell helmets and was about to spend around $650 but tried a regular S-M-L-XL size helmet and it fit perfectly. It took about an hour to try a bunch of helmets but I'm glad I did since it fits well and my sun glasses slide right in.
This is where I got mine and they have some great deals right now.