When I first bought the Samurai, it had a set of DOT Sylvania sealed-beam halogen headlights on it. It's funny, but I remembered these same lights as a revelation 25 years ago, when I installed them on a '73 Corolla to replace a set of "conventional" sealed beams.
Fast-forward 25 years, and the Sylvania halogens were simply unacceptable when on dark mountain roads. The pattern was poor and if you aimed the low-beams correctly, the high-beams were up in the trees.
I decided to try a set of Hella E-spec headlights, and found them to be a big improvement when it came to the pattern, but still put the high-beams up in the trees, though not as bad as the DOT headlights.
I did some reseach and found Marchal headlights to be the best available, but then found that they were $325 each. I also found that Cibie E-Spec headlights were a fairly close second, with Cibie "Z-beams" being a closer second, but unobtanium at this point.
So I bought a set of Cibie ECE headlights from http://www.vclassics.com/ojrallye.htm
(you have to email them for a quote) and installed them a few weeks ago. They were $75 each.
These lights are very nice, with a good pattern and sharp cut-off in low-beam, and great coverage with the high-beams. They are designed so that, when aimed correctly, the lows and highs are both putting the light where it is supposed to be.
OJ Ralleye also has the Marchals if you can afford them. I was very tempted to get a set of them, but opted instead for a set of Cibie Oscar driving lights, with a long and wide beam, which I have yet to install. The beauty of the Marchals is that they have two seperate bulbs and reflectors in the same capsule, so that the pattern is optimised for high and low. The high and low beams on the Marchals can also be aimed seperately for a perfect aim.