Looks like I'll need a new helmet for the upcoming BMWCCA school at VIR. I have a Sheoi(sp?) M90 rated helmet that fits nicely from a previous motorcycle I owned, but the rules stipulate the helmet must be SA/M 95 or better. What's a good helmet to get for occasional use? What do most folks get for casual use? A $500 or above auto racing helmet seems like total overkill for my needs. Was thinking I'd prefer an open face model for the car (as opposed to full-faced on a bike). M-rated helmets seem less expensive. Any input? Any good e-tailers anyone can recommend?