(bigoltool @ Nov. 30 2006,14:12) This is one of those loaded questions. I personally have great luck with the fit of Arai helmets. Currently I have a KRJR corsair but I have owned several others (Super Vent, F1, and Signet). The corsair is not quite as quiet as the Signet It replaced but the added venting is a god send, which made it a worthwhile trade for me since I wear ear plugs always! The fit of the helmet to your particular egg sack is going to be the biggest contributing factor in the relative noise level though. Without wearing them side by side (on the road not the showroom) you are never going to know which is quietest for you. Unfortunately no dealer I know of allows you to test ride helmets. So I wind up going by fit, finish and features in that order. IMHO Arai and Shoei build the best helmets but they don’t always fit everyone so try a few on take your pick.