My two penny worth

I have Poser Pro- on Vista 64bit (intel i7 and 12 Gb Ram)- networked to a couple of other machines for rendering

Poser 8 - like the GUI - although a bit busy
Like the indirect lighting still playing with it to get the feel of it however
Linked my main external runtime with no problems and  loaded saved poser pro scenes into P8 with very little problem

I find that renders from Poser 8 (32 bit) are a good deal slower than the 64 bit firefly (mainly because of the memory handling)

I''ll probably still use Poser Pro as my main tool and use P8 as a training aid for the future Poser Pro next year.