I just installed a set of HID's I bought from Burke Moto Pros. They are a plug n play system, that uses the stock headlight housing. Installation was pretty easy, except for the 2 miles of extra wiring. I think the set was designed for a car, but me and my trusty wire cutters and a soldering iron took care of that. The only thing I was a little bugged by is the fact that these were supposed to be a High/Low beam system, but I only have High beams. I guess it doesn't really matter since the whole idea of the HID's was to get the max lighting I could get anyway. The KFX 450 HID light kit was $145 + $25 shipping. Overall not a bad setup, and very simple to install.