i am in the market for them too. been doing some research. i think 300$ is adequate price on ebay. you need H4's that are bi xenon. if possible get D2S style bulbs. from what i read, they help distribute light as halogen non projection lights do. a few people here have mention issues with hot spots on their HID's.if you don't mind my opinion, a good temp color is 8k.and you don't have to disable the DRLs. if you want to know how to make this work. ask. i think i figured it out.
yea, i got mine from a company that sells on ebay, hidynamic.com. fast shipment, good quality, etc. etc. Oh yea, threw down about 300$ smackers for the kit, as well, like mcgusto previously stated 12000K