I like helmets with a visor, both to block the sun, and also to block the rain. I think white or silver color helmets feel cooler under a hot sun than dark colors. But, the most important issue is fit and comfort. You may find a $20 helmet from Target fits you perfectly or that a $200 "pro" helmet is a poor fit. A helmet that fits perfectly makes using a helmet a pleasure. Take the time to get a good fit...if a $20 helmet fits you perfectly, you have found the right helmet.