I have something like that, Philips Vision+. However a friend of mine has xenon 8000K in his Hayabusa and when he switches that on it's like my light doesn't exist. Problem is if I install xenon in the stock headlight I'll lose my high beam function.
There is a company here in the States that makes a 7" round HID/Xenon headlight conversion unit for Harley Davidson. While they list it for Harley's, as long as there is clearence in the headlight bucket, the light should work fine on any 12v system with a 7" sized headlight. It's pretty spiffy looking, two bulbs in a single round assembly, with two seperate reflectors. I can't remember the link off the top of my head, I'll look it up when I get home from work.
Unfortunatly, it's expensive. I'm looking into doing something similiar, though. I have HIDs on my car, and they are most impressive. I can see double benifits for having them on the Bandit, improved visibility for you and improved visibility for others that might miss you otherwise.