Building a Computer with Quad Display

Jan 2013
I am looking to build a custom computer from scratch. I know all of the components that are needed but i do know know which types will best suit my needs. I am wanting to run four displays and will mostly be using it for buisness purposes. I will also be doing a lot of CAD design for which i would like to have a decent amount of graphics power. Any suggestions on which MB, Graphics cards, CPU to buy? I hadn't really planned on any amount yet. I am willing to spend up to 800 probably. I don't want to sell myself short by keeping a low budget, but naturally, the cheaper i can keep it the better. overall i want reasonable quality. Thanks.