Great thing with E-code halogens or xenons is the sharp cutoff, which makes adjusting them as per the OP much easier than the older, fuzzy cutoff of domestic halogens.
Her ladyship's panzer (aka A4 Audi) has great xenon lights, so I'm expecting more of the same with the X1....if it ever gets here.
His advice is well taken to not crank them up too far; opposing traffic will let you know of their unhappiness, and I suggest you follow someone you know at night to get their impression as well.
Now if we just could take a ball peen to the lights of the damnfools who stick xenon capsules in halogen fixtures....
Moon