I didn't see much reason to upgrade to Poser 7, but when the Poser Pro base came out,
it seemed like too good a deal to pass up.  I'm really happy with it so far.
I am really impressed with the render speed of Poser Pro.  Not sure how it compares to
Poser 7, but I had been using Poser 6, and it seems a lot faster than Poser 6.
Plus I really like how it renders using multiple threads. It starts out like a normal render,
a block at a time, and then part way through, BANG!, the render is complete.