If it's for Poser or 3d then have it built. You need lots of memory (if you're going to push it)and lots of hardrive space. Win 2K is good for this, too. Processor speeds are not as important as you might think. The hardware available exceeds the limits of the software so research and don't waste money. Take it from me...I had 3gigs of memory 2 years ago. And memory has its own ratings. Spend the money on registered if you can. Building your own will save you if you could even find a comparison.