Strengthen the weak links in your system. No need to spend big $$$ for a system that barely outperforms your current one. The weakest link in this case is the graphics card. Get yourself a Chaintech GeForce3 ti 200 for $90 at newEgg.com. Overclock this card to above GeForce3 Ti 500 speed (not difficult, folks who bought this card at newegg have done this without doing anything extravagant). As for the CPU, is that thing overclockable? If so, overclock it!