Pipes, there's tons of info on this site about after market headlights. Some bad experienced, some good experiences. I've had a bad experience in the past with some aftermarket lights with ballasts that kept failing, but now I'm having a great experience. Check this thread out.

http://www.Xoutpost.com/bmw-related-...fters-hid.html

If you have stock HID, and your low beam ballasts are good working condition, this will be a great option. If not, good luck in your search! They are essentially "eBay" lights, but for a better deal and tested by some of us xoutposters.