Silvia Headlights ~~Halogen/Dual/Triple~~

[white smoke]

I am doing a Silvia conversion on my s13 and I am wondering what are some advantages/disadvantages of each of these lighting setups?

I also have some general questions about the lights as well....

1) It seems that the halogens/bricks are the hot stuff right now but my question is why? Purely looks?

2) If I do an HID conversion on the dual or triple projectors, whats the cutoff like? (mention the brands of HID kits if possible)

3) All three sets of headlights have fog lights built in, how are people wiring them up to the pop-up switch? A how-to link or schematic would be awesome! Seems like it would be a simple relay circuit.

4) How does the projector fog light (triples) compare to the standard fog light (duals) as far as output goes?

Thanks Guys/Gals