I'm shopping for a desktop computer for my daughter who is learning AutoCad. I'm trying to get a fix on what CPU and what amount of memory would insure that AutoCad runs well. In addition, I'd like to know if I should avoid computers with shared video memory. Finally, what do I need to know about graphics cards? Do I need an expensive graphics card like the NVidia GeForce 4 Ti4600 or the ATL Radeon 9700 Pro? If my daughter is going to be using AutoCad I would like it to run well on whatever desktop computer I decide to get. She is in the interior design/decorating line. Thanks so much. John