I currently run niterider firestorm HID and Light Motion Arc HID...and alas...a generic cateye blinkie. My rear is not that great but my front F.O.V is insane; I've seen cars giving me the finger coming toward me on the opposite side of the road only to realize I'm a lowly cyclist (ride softly but carry a big stick is my motto! or two). I've yet to see another commuter with 2 HIDs. That said, I'm thinking of getting another HID for the helmet....just for fun. If a car passes close to me, I'll give him the "look"-- a dazzling blaze of E.T. UFO intensity light. However, It'd be until Christmas before I muster enough dough.