I would go with ram, I run an 800 mhz atholon chip with win xp platform. If I put poser 5 as a high priority I can reander 2 fully transed judys including p5 hair and about 10 props. In about 15 min. Im also useing 768meg of ram and a radon 8500 128meg vidio card. I have had no p5 lock-ups on a 120 frame walking animation. Thats why Id go with ram. Also, look into high end vidio cards. The ATI series is set up to help when rendering.