I have a Dell 1.5 P4, 256Mb pc800 rdram, Radeon 7200, and am looking to upgrade. I only have $300 to work with, and I am not sure what I should sink my money into. I play a lot of video games, so I really want it to be able to run future games well. Rdram is so expensive, I have even considered trying to assemble a cheap system instead of upgrading my current one. Any suggestions?