If it was not for one of our last few dirt track converting to Astroturf, I would have been in the market for another 4WD buggy. Unfortunately I don't enjoy running 4WD on carpet/Astro so much, so I'll probably pass. But never say never!
Edit: Who am I kidding? I know that I'll buy one eventually. After all it is the YZ-4S(chmidt)!