Osram Nightbreakers H7!!! But don't leave them on all the time. I did it with mine since the car has the coming home function. Since they're quite highly strung bulbs, I think the Philips Xtreme's aswell, they don't last as long.
Mine died after approx 13k miles. But they were on all the time as I said.
Should I get another set, gone through 2 sets already, I'll have to turn them off when not needed.
Good lighting, much further/whiter/brighter than the originals.