Thanks all ya'll's...

Building one would be cool. I did that a few years back just to say I can do it, but I tend to get carried away. Last year I was all fired up to build another one, but $3000 in parts with some super duper water cooled case, multiple hard drives and all, I figured I was getting carried away.

I'm using a HP with 1.67 gig processor with 512 ram now and it will run Cad, but it's painfully slow.

I've got these items listed wrote down to look for.