In my general 3D modeling/rendering experience, RAM makes all the difference. For example, renders (in Bryce/Rhino) that took 20 hours to render with 128MB became 6 at 256MB and 1-2 at 512MB. I upgraded today to a dual 2GB Xeon w/2GB RAMBUS, so I'm thinking maybe the picture will render before I even know what I wanna model :-) Note I have not done any comparisons with Poser - yet.