HID, aiming lights

So Im thinking of getting a HID conversion kit. Probly within next couple weeks. Personally I think our headlights suck and dont like the way the projector beams look. Since our headlights weren't designed for HID anyone have any problems with aiming the beam. I would hate to buy 'em and the light go everywhere, blinding people, and not helping me see any better. I know the 8000K is a blueish tint and 10000K is purple but are any of 'em actuall any brighter or better??