I used the D1S Philips 85415XV C1 Xtreme Vision bulbs and am happy with them.

I use the D2S Night Breaker Unlimited in my M5 and they are fantastic. A lot of light but it's not one of those stupid blue bulbs that people say is white. Definitely a warmer color than the CBI or even venerable 85122/85122+ but that's to my eyes and in an E55 bi-Xenon projector inside of a much older design headlight assembly.

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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