The xenons on the MK5 are great, you have a diaphram for dipped and main beam and they also use the halogen main beam that all golfs have, so you have two main beam bulbs, its like driving around with day light it allows you to see so far ahead at night that its like day time driving really great, and the white light on dipped beams reduce the amount of eye strain.
If you get a non xenon car then try and get one with the winter pack as that will at least give you the headlight washer which will make a retro fit easier, just the headlights and the auto-leveling then for a full install.