keep in mind, there is a huge difference between stuffing a plug-and-play HID kit into a crappy "projector headlight" you bought off ebay, and doing a bi-xenon projector retrofit into a stock headlight housing.
If you want HID's, real bi-xenon projectors are the way to go. It takes a day of work and some custom modifications, but the light output/even distribution/lack of hot-spots and sharp cutoff that a true bi-xenon HID projector craps all over anything else out there. Not to mention, its the only correct way to do HID's and not piss off everyone else who passes you on the road.
ben