I want a computer that is actually able to run ProEngineer and open assemblies without crashing. 3.0Ghz+ Pentium, Xenon, Core Due, Core 2 Duo, Quad core 3+ GB ram 500+ GB RAID 1 and an OpenGL graphics card (ATI FireGL, NVidia Quadro?) I haven't built a computer in a long time so I don't know what is up with hardware specs. Should I buy some premade HP/Dell or build one myself? Will the OpenGL card make that much of a difference if the rest of the components meet the specs?