Theres a big difference between a rotary and a Honda engine engine, the rotary makes great for engine transplants. its SUPER light and creates good power for its size. I wasnt referring to just s2k motors, all honda motors.
Why not go with the VG30DET??? There are several people on www.z31.com that are doing this swap right now. As far as I know there are no advantages with going with the VQ30DET vs. the VG30DET except maybe the engine is lighter being alluminum, but the VG30DET can take much more power.