Well you can always retopoligize your sculptris models. I do this. It lets you model with out worrying about edge loops and mesh density etc. Then when you are done you lay down a  more efficient mesh. 3d-coat has really great retopo tools. But warlock is right it is easier to manipulate a low density mesh. Also if you are looking for some good modeling tuts check out. http://www.nevercenter.com/silo/videos/tutorials/
The tuts are done with Silo but hey can apply to most box/mesh  modelers. The Minotaur tut is really good.

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"The true sign of intelligence is not knowledge but imagination".

Albert Einstein