Helmets are there to protect your head, so therefore I would not necessarily recommend buying the cheapest variety. Most expensive does not necessarily mean better, however. Helmets should carry at least a CE, ASTM, or Snell RS-98 certification. What you often pay extra for are features such as the advanced ventilation systems, and ultra-light weight or sleek fit, and other extras such as washable liners, etc. The following Best of the Rest helmets are very good quality bargains that can be easily found in stores and online.