This $193 Brunton says it's the brightest LED lamp in the world, but it doesn't have the top-of-the-head strap, which I don't like. I'm going for the upside-down jockstrap look. And I don't want the brightest LED; I want the brightest, period, without having to resort to a belt-clipped battery pack (i.e. a self-contained simple unit for the head only). I don't need ultra long batt life, just high output for short times, with a low-output choice or two to switch off to as needed.
http://www.karstsports.com/brl5he.html
Or if you want to get really crazy, here's a $310 lamp.
http://www.karstsports.com/sts7hesy.html