Hard edges won't help you if you're rendering in DAZ studio, but you can do bevels in blender.  There's a script in blender called "Bevel Center" that can help you with that.  It works just on the edges you have selected rather than the whole model.  You'll probably want to change the size to something really small like .01 (you'll have to enter that by hand, the slider won't do it, but you can change that after you've hit the bevel button so you can keep messing with sizes :)  The smaller the bevel is the sharper the edge will look.

As for the movies...honestly, I think they're all about the same quality.  All the criticisms I've heard of the new ones I think apply just as well to the old ones (except maybe for the jar-jar thing, but there are other irritating characters).