I would say go and check the label on that one. From the looks of it, it's only DOT approved which means it probably won't meet the requirements. If it is though, that's really cheap for a Bell helmet.
Here's a link with info on what the ratings mean.
http://www.sfrscca.com/solo2/faq/auto.htm#113
and here's an example of an online autocross shop. http://www.soloperformance.com....aspx
there's probably more out there than what they offer, but its a good start. Google is your friend. Also, like brokeas240 said, you may just want to go to an event and either use a loaner or borrow a friends helmet until you figure out what type of helmet you feel most comfortable with. Not sure if a head sock is legal, but definitely bring a towel to wipe down the loaner before and after you use it. They can get pretty sweat soaked after about the second run, which is kinda nasty to stick back on your head.