< or = 6000K for best light/color.

I had both xenon 6000K head lights and xenon 6000K driving lights on the Civic. Compared to 4100K, usable light was reduced significantly. However, with both powered on, it was fine.

The cheapest/easiest solution (and glare reducing) would be to get a H4 retro kit and make sure you get the glare shields.

The best/costly solution would be to crack open your headlights, retrofit xenon projectors (Bosch, Hella) and make sure you aim them correctly before sealing them. If someone makes a cheap projector headlight for MR2's, I would get those and gut out those crap projectors with the real ones.

All OEM Xenon's use D2S or D2R bulbs which work specifically with D2 bases.