i like the petzl ecrin roc. it's a little on the heavy side, but the benefits outweigh that. it has way more fit adjustability than a foam-molded helmet and is easy to adjust on the fly for a good fit regardelss of whether you want to wear a hat or not. (it also works with high ponytails for the long-haired gals and hippies in the crowd - yay!) it's beefy and will stand up to much abuse, and it's also one of the more comfortable climbing helmets i've ever tried.