Go to your LBS and try them all, they shouldn't give you any stress about trying them all as long and as many times as it takes for you to feel comfortable. I used to think the lighter more expensive helmets were designed not to make your head look so mushroom like but they're just lighter helmets and the weight difference is very slight compared to something cheaper. I ride a BELL Alchera only because it was black & red and it was on sale at performance for around $40