OK. I have used the stock OEM headlights and I agree that they r total crap, bordering on dangerous.
Years ago, I upgraded to a set of Delta 7" round from Quadratec with 120% Halogen globes (bought from Repco) and these were heaps better in terms of light brightness and spread.
I now run these with Xenon globes and the light is even better... very white and bright.
I have also tried LED headlights and these r even more brilliant (from Quadratec again). I mean, really, really good. I had to include an anti flicker device for these but its a simple plug in and play set up.
I took these LED lights off because I thought that they were responsible for making the HID spotlights flicker, and occasionally not allowing them to turn on.
However, I have worked out that the flickering spotlights is because of a loose connection in their dedicated circuit, rather than because of the LED headlights. I have fixed this problem.
I will get to re-fitting the LED headlights again soon, before heading off the Broken Hill and environs, since they have proven the best of the lot.
So, when the LED headlights were in place, a >500% improvement in light quality and spread. With the HID spotlights on, night turns to day, absolutely, and I swear u can see a km ahead.
There r 2 adjustments to make: up and down with the white knob thingy above the lights and laterally with a small screw on the inside of the light housing. Most people don't know about this one, including the dealers. You will need a Torx driver for this one.
Hope this is helpful.