What length brevets? The 300k next? How many hours does the battery need to run?

Bubba bought the Niterider Classic Dual Beam. It is not HID but puts out a ton of light for a pretty reasonable cost, certainly less than HID. The current version has a top tube mount battery so you don't give up a bottle cage.

http://www.pricepoint.com/detail/115...ght-System.htm