We just had a new machine built and got a P4 3.4, 2GB RAM, SATA drives, etc. We got a Quadro graphics card for it (I don't remeber the specific model). For processor, I would be looking at the new Intel processors, they have been benchmarking very well. Graphics cards: At our firm, we have always used gaming cards with very good luck. They are consistantly less expensive and for the work we do (complex surfacing, plastic products, and assemblies smaller the 100pcs), they work great. I just got a nVidia 6800 GT for home and it works very well and doesn't have the window limitations that nVidia used to have. My experience has been, however, that nVidia cards seem to work better with Pro/E than ATI cards (in the couple of cards I've used).
Good luck.
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Jason Williams
K Development, Inc.