I have ZKW projectors on my car with a 4300k HID kit. The ZKW's ruled just with halogen bulbs compared to the US spec, but with the 4300k kit (the whitest and brightest) it's just crazy, my highbeams barely do anything, although they do illuminate higher.
The light cut off on the projectors also allow you to run very bright lights without worrying about blinding oncoming traffic (if they're adjusted right). Although I do notice that I have blinded people in front of me in the right lane on the highway when I'm in the left lane. (the cutoff sweep up to the right to illuminate street signs.)
"Driving is like a narcotic, an addiction that can take over lives. It ruins people, breaks families apart, and even kills. Itís habit that needs to be fueled. Time, money, rationality, sweat, knuckle skin, and anyone who disapproves are of little importance to a driver, and are often overlooked. Hi, Iím Nelson, and Iím a drivaholic."