I need to build a computer to use programs like AutoCAD with decent performance. However I need this to be as cheap as possible. This is the only thing I need it for so I can skimp on everything except the video and processor (I've already got some ram). What would be the cheapest model to look for and still get what I need out of it? My first thought is one of the NVIDIA crush motherboards with the onboard video, but are those even out yet?