Yes i also use GOZ, but sometimes i just export from Sculptris to ".obj" to retopoology dircetly under 3D Coat.
Yep sculptris rules, easy, fast and great results, and anyway you can bring high res details , or downgrade resolution on other areas.

Blender should use such system fro 3D scultping , it would be ultimate tool : Hard Surface modeling mixed with sculpting tools.