I'm real interested in this too, I wear a seizure-crash helmet when trapsing through rougher terrain (having epilepsy). This custom fitted helmet (I've mentioned before) is based on a hockey helmet design and has too large of a profile and gets too hot in the summer. I want one that is lighter and has the features/requirements you are looking for. This helmet of mine cost my health insurance around $400 (the company tried to bill them over $700), but I don't want to spend that much for sure.