I installed the Philips 85415XV C1 Xtreme Vision and am very happy with them. They're a little warmer at 4800K than some may prefer.

The Osram Xenarc 66144 D1S CBI is another in the very popular and effective CBI line. They're 5500K so blue like everyone seems to want.

If you want the best out there right now, look at the OSRAM Night Breaker Laser.

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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim