I know this may seem a daft point, but have you tried adjusting your headlamp beam out of the gods ?
I have a Mar 04 GS, and found that the lamp was not exactly inspiring, what I did notice was that the beam was trying to light up too much of the road, it was great if I wanted to see the tree tops and the top most point of the road signs but crap at showing me where I was going when there was anyone else on the road with their lights on.
It will be trial and error, but try bringing the beam adjuster down, it you are lighting up an area above the boot line of the car in front it is still too high
Animo
Tulip Twinspark