Help! Looking to build a computer for AutoCad/Pro/e usage

if you just want a computer for cad, then you can get pretty much any computer. i have autocad 2007 and i don't think that it benefits my phenom 9500. i got the phenom because of the rendering i need to do in max. this means that you can get away with almost any cpu. hell even my old laptop with amd +3700 ran cad without a glitch. building it yourself can save you money but you can also buy some preconfigured ones at bb or cc or microcenter. i suppose it depends on what you personally want to do, build your own or get something else. youre not limited by needing something specific. any cpu, gpu will do. just get like 2 gb of ram, since it's cheap.

a nice way to spend some money would be into a 64bit OS. if it's just simple files of autocad like a 2d construction documents, you don't even need 64bit. 64it will only benefit you if you use larger files. otherwise stick with xp 32bit.