Since you're in the US, this is where I got my PC: http://visionman.com/
Pretty good deal, just make sure you buy specific components elsewhere if you find a better deal. You can get them to fit a motherboard and power supply and what-not and then you can add on from there. When I ordered from them I just had them throw in a hard drive, a PCI USB thinger, 1gb of RAM, and a floppy drive (I have old games I like to play.. WHAT?! Stop staring at me!). I salvaged a 100gb drive from my previous desktop, CD drive, and bought an X800 XT seperately, so it came to about $1400 total for the entire setup.
Pretty good deal, just make sure you buy specific components elsewhere if you find a better deal. You can get them to fit a motherboard and power supply and what-not and then you can add on from there. When I ordered from them I just had them throw in a hard drive, a PCI USB thinger, 1gb of RAM, and a floppy drive (I have old games I like to play.. WHAT?! Stop staring at me!). I salvaged a 100gb drive from my previous desktop, CD drive, and bought an X800 XT seperately, so it came to about $1400 total for the entire setup.