I think the renders from LUXRENDER come out better than Poser, yeah (Reality is just a port from DS to Luxrender. It doesn't do any rendering of it's own). Of course, Luxrender renders take all day and perhaps all night as well while Poser or DS renders take just a short while. Of the two, DS and Poser, I think Poser makes the nicest renders. Luxrender renders are superior to both if you're willing to wait for a render.

You should be able to use your Poser files in DS except for DS specific materials and shaders. They don't really transfer over into DS.

Laurie