US Xenons...my impressions
while I am sure the ECE ones are great, I must say that the lights on my car are really nice. I had ECE Xenons on an earlier e39 and they seemed a tad brighter but it's really nice having the auto levelling feature (the other ones I had weren't on the car originally so they didn't have that). Also, the high beams on my e46 are a LOT better than the e39, which seemed to add two spotlights while these are nicely widespread, and don't seem to conflict with the Xenon low beams nearly as much. The highs and lows are both well spread and very complimentary.
I will be changing the high beam bulbs soon, it's not very easy on these lights.
I bought some Philips VisionPlus H7 bulbs in Germany last fall, they are supposedly 50% more light and should work even better than OEM. They are good bulbs.