there have been several threads about this, do a search on it. If you want the most light you can get on the road, the try something like Silverstars or PIAA super plasmas. If you are simply looking for the blue look, then any of the cheap one will do. If you want to run real HID, then you need to get the whole setup, inlucde bulb, balasts and everything. Also, our stock headlight isn't designed for HIDs, so it will blind on coming traffic, so you either have to get new headlights or do a HID retrofit. A good set of HIDs plus retrofitting will set you back atleast $400.