I'm quite happy with my lights now. All I did was stick the upgraded wiring harness in. For less than £40 it made a noticeable difference. I kept the standard bulbs, but I am guessing if I went with a higher wattage, over better filament technology, I'd see even more of a difference due to the current carrying capacity of the wires. I was going to stick the spare one I had onto the main beams too, but actually they're fine. Maybe bypassing the dipped beams with the harness improves the loading for the mains somewhere.
I wouldn't say no to more light, but frankly it's fine as it is. It would be better if I dried the insides out (again)
C