Go here:
http://www.tigerdirect.com/
Start from there, you cant go wrong. My supplier uses it for *particular* articles, but most of his customers *ahem* prefer to get their heads inside the case.
Theyve got some nice barebones systems, grab one, and then a vidcard, you should be good to go.
Then you can leave the Dell for the parents/younger sibling and be the hero of the household as well, while you game in graphic splendor.
__________________
"We are Dyslexia of Borg. All your ass will be laminated"
Don't call your ISP when your computer breaks. You dont call the Dept. of roads when your car breaks down, nor the power company when a lightbulb burns out. They dont want to hear it, and neither do we."-Coyote