The Touratech HIDs are just Hella Micro DE xenons. They can be had for ~$400 for a pair on Ebay. I've got a set on my Monster that I use in a custom headlight set up I made. Bright is an understatement.... I've had people flash their lights me when I had both on in broad daylight.
Temple, TX -> Cape May, NJ -> Mobile, AL -> ECity, NC -> Kodiak, AK -> Mobile, AL -> Sacto, CA -> Cape Cod, MA -> New London, CT -> San Francisco, CA -> Juneau, AK (summer of '13) -> where to next?