If you like the nightbreakers, take a chance on a HIDs. They really night and day!
I recommend H4-3 bulbs so you keep your high beam, and I prefer 5000K as being the whitest light. 6000K and upwards starts getting blue. You can get a cheap and nasty car kit for about £25, and if you are reasonably handy, you should have it fitted in about an hour. If you don't like the results, you can remove it and noone will ever know it was there. If you are still nervous, you can even keep your old H4 bulb's under the seat and swap them back in at the side of the road with no additional tools.