Bell makes good helmets, but when you talk about helmets it's all about what they are protecting. How much is your head worth? Mine is worth $25 on sale at REI.
Check nashbar/performance, or your lbs and see whats on clearance. As long as it is CSPC approved, it will work just fine. Spendier helmets may have better venting, or flashier graphics, but are otherwise similar from a protective standpoint.
boog