I'm considering buying Poser PRO as an upgrade for my Poser 7. 

Can anyone comment on Poser PRO for me.  Is there a greater ease of animation and quicker more complex rendering ability with Poser PRO ?   I have a brand new computer with Vista 64 bit OS, NVIDIA GeForce w/500M dedicated, QUAD processor, and 8 gigs of RAM.  I think I'm ready to go  :)

BUT is Poser PRO worth the $250 for an upgrade?  Will I experience higher quality renders?
Will complex animations be easier?
Will all my Poser Characters work with it?

THANKS