HID lights
I got an HID light from Les and fitted it to the dipped beam myself a few months (not a very difficult job). Great improvement and definitely improves both vision and visibility on the road. Had thought little point in replacing main beam, especially with PIAA lights as well (although these now look puny and very yellow in comparison). However notice that flashing other road users now has no effect - hardly noticeable against HID headlight, so decided to replace main as well. Funds being tight, bought a pair of German made H1 HID lights off fleabay for £34 for the pair - fitted easily apart from fact that ballast is much larger than Les's obviously superior product, but still disappeard under beak. So far works well (and at least I have a spare one if it fails!)