I would build 2 computers. One with all s/w, one just for Poser & 1 or 2 more 3D programs. Install the minimum on the Poser computer. Have at least 1.5GB RAM. if you are that serious about hardware, you really need to reconsider your 3d software. For pure rendering speed at the highest quality, you should consider buying 3dsMax, & maybe a plugin like Reiss Studio for importing Poser projects into Max. Then Network render acrossed 2 or more computers. The Vray plugin renderer for Max can netrender within a single frame. The Global Illumination render speed blows away all competition easily for even still images, & for rendering animation- even faster. Also- yoou will save a fortune if you learn to build your own. Also helps teach you how to fix/upgrade by building yourself.