Just remember; the CREE bulbs will make your radio static when they are on, so the radio will cut in and out as it blinks. The severity of it seems to vary; sometimes just a little static, other times it completely makes the radio static out. My friend who put them in his E36 had the same problem.
Personally I don't care; it's worth the light output. I would like to eliminate it somehow though, if at all possible...