Dell dimension 9100 for 3d design (xpost from hardware)

Im shopping for a new workstation to run 3ds max, alias, cad, photoshop , etc. for animations high quality renderings. Curious how the dell dimension 9100 w/ geforce 6800, 2gig ram, 3ghz chip will perform with 3d software above compared to the percision 380 worksation with same specs except the graphics card which would be the quadro fx 530.
I realize that the percision workstation is more suited for what Im looking for but I can save over a grand by going with the dimension, is the performance differance between the two that noticible?

You are going down the wrong path. If you are looking for a serious CAD station you need to look at the Dell Precision line, not Dimension.