I have about $500, maybe a little more to upgrade my computer. My current set up is an Athlon XP 2800, Asus A7N8X-E mobo, 120GB seagate HD, 2GB patriot pc3200 ram, 500W fortron PSU, 6800GT AGP video card, audigy sound card.
I was going to keep my hard drive, power supply, audio card and ram...