Have you thought of the HID Bi-Xenon bulb and ballast? I believe it is only 35 watts or so but puts out quite a bit more light than any other option. A bit more pricey, though... but then again, what is the price for being seen at night and being able to see at night...

http://www.gohid.com/product_3101_465.html

Everything included for low and high bean HID Bi-Xenon.