I am doing all my stuff on Toshiba core 2 duo 1.66GHz, win xp professional with 3GB ram (used to be 1 gb, all my pictures in gallery are made on 1 gb system) and GeForce 7600 128 mb vram...works fine, but when you wanna do more complex scenes, you soon hit the limitations....I have Vue 6 ....no problems at all but  agree with Bruno....displacements and in many case radiosity  are  no go area :)