I should add that I was really just looking for conspicuity. I rarely ride that bike at night. It's just a commuter and around town bike. Maybe at night if I rode into Baltimore for dinner or something. But I live in an urban (well lit) area and really only ride around urban (well lit) areas on it so no real need for additional lighting for ME to see. Just for OTHERS to see me!
On the GS though... HID's, motolights (have the brighter bulbs, just haven't put them in) and a set of the cheapo WalMart lights)