I have a dual processor machine with 4 gigs of RAm running Windows Xp home. It was slow rendering in Vue and Poser. I just bought an i7 950 with 12 gigs of triple channel RAM, a Geforce 9800GT 1 MB graphics card, and Windows 7 64 bit. Poser flies in rendering. I never thought it could go so fast. That's Poser PRo 2010. Vue 8 has also speeded up. I say go for the quad core with as much RAM as youu can afford.