A couple of points: first, I must be one of those "@$$holes" on the road that blind everyone since I installed HID's in my Silverado pickup, huh? Well, I've got to say that that is just a bunch of bunk. Truth is, I was getting A LOT of people flashing their brights at me when I was running SILVERSTAR (pieces of crap) bulbs, and only once so far with the HID's, and that's because I was at the crest of a hill as the other car was approaching. The factory headlights are built for Halogen, and I took the time to compare them with the HID bulbs. The halogen filament and the light element area on the HID were in the exact same position as measured from the base of the bulb. PLUS, the silverado headlight (low beam) shields the bulb in a metal housing so that all of the light is directed to the same area on the reflector, and not allowed to be emitted straight out the front. End result: Same exact lighting pattern as the stock headlight.
SECOND point: The projector beams you refer to are one of the more annoying things, and are far from a perfect beam as viewed by approacing traffic (me). I can't tell you how many times I get blinded by them, factory install or not.