If your planning on getting a dell, check out slick deals.com. They have awesome dell coupons. Just do a search for dell and click on a coupon link. It will save you LOTS of money. I recently configured a 3.0 GHZ 6XX P4 with a 6800 video card for 1100 bucks. Ow ya, it had a 20 inch FW too, which retails for 500 dollars. Pretty good deal if you ask me. ALMOST matches the price of building it yourself. By the way, if you know how to upgrade your own parts, then you can buy a base machine with the monitor for 650 dollars after mail in rebates, and add in a 6800GT,DVD rewriable drive, and 160 GB hard drive for only 400 dollars more. Heck, you can even buy a pc power dell power supply for 100 dollars if you aren't sure about the power supply, and have it totaled out to be 1250 for a pretty half decent gaming machine with an awesome monitor!(free OS also heh)
6600GT PCI-E for sale/Trade. Check the FS/FT forums on tech-forums for details.