I've tracked down the xenon light assembly(pn 63 12 8 356 541/542) at the local stealer. Ugh! $960 per light! I'm upgrading the lights in my E34 M5 and need to talk myself out of this oem xenon route. In hopes of this, can anyone with the xenon factory option characterize the light pattern and intensity compared to the ellipsoid halogen lights? Thanks for the help.