I was driving back home just now and was thinking about this thread when i saw peoples xenons and made a special effort to compare them with normal lights.... and surprise surprise, the only lights i was blinded by were normal ones.
I dont understand this opinion that xenons are known to frequently dazzle people. Its only the ghey old shape fiat punto lights that annoy me, that look like xenons.
Out of a Saab, few mercs and beemers and a couple 4x4, oh and including a 172 i spotted on ferry road, the lights never bothered me at all. But then following them is a car with one light out and the other pointing towards the sky (blinding me), a while later a little ford ka with 4 people in it (blinding me) and them either someone with full beams on or very bright dipped beam.
If anything, the xenons are better as they last 6 times longer then standard bulbs, very rarely would get miss-aligned and always raise or lower depending on the wieght in the car.
Just my 2p's worth.