[antonye]

Don't go for anything with a higher wattage rating as it will fry your electrics!

There is no build in margin to run anything but a 55W headlight through the reg/rec.

I run blue tinted bulbs as they appear to cast a whiter light and the blue sheen gets you noticed more as it's an unnatural colour.

If you're lacking in the "lighting up the road" stakes, it might be worth fiddling with the headlight adjuster to make sure it's setup right.