diff'rent strokes for diff'rent folks...
wyosteve,
I've used auxiliary driving lights on most of the vehicles I've owned, and I've played with about all the major manufacturers. The brightest lights under $100 I've EVER installed were Hella 500's with a 100w bulb upgrade. Big disadvantage to the Hella's is the cheap wiring harness. I've used Piaa 40's, and as a fog lamp, they weren't too bad, but not as good as Piaa 520's, and the new Piaa 580's should be even better, but I don't know for certain. I now have Piaa 80 Pencil beams, and couldn't be happier. All the Piaa light sets have decent to excellent wiring harnesses, and install times are usually less than an hour. The Catz/FET lights are of good build quality, but don't put out enough light to help much IMO. Lightforce lights seem to be the current choice of the Over-the-Road drivers, and they are usually pretty picky about what they use. A moose hit is pretty serious, even with a tractor/trailer. When I finally get around to it, I'll be replacing the factory fogs with Piaa 510's, wired into the factory wiring. I think all will agree with me though, something will be an improvement over what you have now.
-Adam