I've had a Scorpion EXO400 for a couple years now. When my wife went helmet shopping, she tried the 400, but found the EXO700 was better vented and MUCH lighter than the 400, for only a few bucks more... Scorpion also has a slick little chin wind flap thingy that cuts ALL the wind out from underneath...
An EXO700 is now on my Christmas list