I'm looking for a second PC for a family member so that we can play some multi-player games on Steam. (The games can run with settings shut off and at 1280x1024 if needed.) I can get a refurbished Dell with a Core 2 Duo 2.8Ghz and 4GB for ~$330, but adding a moderately-better-than-an-X-Box 360 graphics card (which would have to be new) bumps it up to $500ish. That's too much to pay for a second-hand PC. I'm not looking to sink too much money in this project since the spare PC will be idle or used for web browsing most of the time. Any suggestions?