I will only ride with a Specialized lid. They are as far as I know testing to Snell standards. I know that Snell motorcycle helmets are the way to go. And all racing sanctioning bodys (NASCAR, SCCA ect) require the most recent Snell standards in you're helmet or you don't go on the track.

I just trust Snell testing over any other form of testing. My own 2 cents worth.

Mark Shuman