Base configuration, Form Factor

I choose the the Vostro 430desktop. When I purchase my new computer I want a high performing PC that can run multiple applications at one time. Perferably a two screen monitor set-up. I would also like a Pc that runs the new Windows 7. I plan on opening up my own buisness within the next few years and purchaseing a computer is a big investment so performance is a must. I would also like to run a dual-monitor setup. I choose the Vostro because it has 3Gigs of sdram and it has the quad core power processor. I feel like this would be a good place to begin.