Greg - thanks for posting those links. I'll look forward to your comments and/or photos after installing and testing.
I got similar looking HID kit from the Bay, but as you say, for a few quid it might be worth a punt on the others. I don't mind getting cheap main beam bulbs, but having been let down with a budget dipped beam 'upgrade' years ago, they both popped within 48 hours of fitting. If I hadn't kept the originals in the car, I would have been a bit stuck getting home late.
You'll love the difference that dipped HID kit makes, so much better than halogens when considering the rather poor throw the Alfa headlights manage. Plus it'll go straight through MOT's without any bother (assuming the aim is correct).