I only use Truepose when I need to move an animated figure from Poser to Truespace and I have to say that it works very well.
NURBS ...... not being familiar with Rhino I can only answer with a "probably". I tend to use the sub-divide surface tool in preference to nurbs. I found that using nurbs resulted in meshes so dense that when I saved to a CD I could not lift it out of the CD tray!