In truth it doesn't matter because the helmets have to meet the same standards. A $50 helmet will more than likely protect you as well as a $200 helmet. It may not cool you as well and it may weigh more. The adjustments may not work as smoothly but they will work. So pick one you like. I use a Specialized and a Giant. The Giant was about $40.00 and the Specialized was about $110.00, it was a gift.

The Giro Transfer sport might work well or anyone like it. Give Nashbar or Performance a try unless you have a LBS you trust.