My friend has an $800 budget for a machine that will play Spore and Team Fortress 2. The $800 includes the purchase of a monitor. I'm thinking E6550 with an Intel BOXDP35DPM LGA 775 Intel P35 ATX Intel Motherboard. This is quite the expensive combo, however. Would a new AMD CPU suffice? I'm confident in finding RAM and a Hard Drive, but I don't know about the Power Supply and how much I'll need. Would an Antec Earthwatts 430W be enough to power the machine? I'm thinking an 8600GT would be in order and 2GB of RAM. Any suggestions?