I have tried a lot of different things in my 335 and spend lot's of money and for the X5 I just bought the GP Thunder II's for like 8 bucks + 5 shipping and they are better than most other things I have tried including $100 LED's and equal to anything else with the exception of HID's, LUX or OSS, but I ain't spending that much money on stupid light bulbs. They basically look like stock only white - exactly what I wanted for short money.

BTW - who is masochist engineer with girly hands at BMW that designs their headlight enclosures - both my 335 and the X5 bulbs are only serviceable by a child pretty much - dealer mush hate bulb replacements more than anything!