So now we have five engines that can run SuperDuper Quake:
MHQuake, or DirectQ, is a Direct3D engine
SuperDuper Quake Engine (based on Enhanced GLQuake)
Latest version includes improved colored lighting without needing to support BSP v30! Ummm ... YAY!
Remake Quake is based on FitzQuake
In no particular order. I've had problems running SDQ with previous versions of MHQuake, but this one is GOLD.