I have always gotten a higher end helmet, not sure why. A couple of years ago I had a slight crash and a piece of my helmet broke, since it was still under warrenty I figured it wouldn't hurt to try and get it fixed. While I sent the helmet back I needed something on my head and bought a cheaper model. It was night and day the difference in comfort. Both helmets fit fine, but the cheaper one was not as comfortable after an hour on the bike. The broken one was replaced with a new one and now I know why I spend the extra cash.
oliverw