I replaced mine with Sylvania Silverstars purchased at Pep Boys about 40 bucks for the pair.
I was not impressed.
On the other hand I changed out the foglights with Xenomatch from Hoen and was very pleased.
http://www.xoutpost.com/x5-e53-forum/...ght=fog+lights
I think I am going to order the High Beams from them as well.
I would have liked to go with HID's but did not want to spend that much.