I have the Alpine HID angeleyes kit on my e92 M3, and is truly happy at how bright its is in daylight. As mentioned by Alex the HID bulb doesn't run hot, I'm running the kit for almost 5 months and have been reliable. I have the AIBs on my M6 and the brightness level is incomparable.
07 M6 blk/blk, Racing Dynamics RS58 stroker with custom ECU tune, Primary cat bypassed+Akrapovic Evolution exhaust, BMC air filters, RPI air scoops, H&R springs, Dinan FRC & rear sway bar, 20" AC Schnitzer V
08 E92 M3 sparkling graphite/red, Competition pack, Innotech exhaust