I have a 1.25GHz 15inch PB with the stock 4200RPM drive and 512MB of RAM. I'm wondering how much upgrading to a 7200RPM and 1.25GB of RAM will help in terms of fps when playing games. I get around 18-20 fps in world of warcraft now, just wondering how much an upgrade like this would help or am I too limited by the radeon 9600 card. Please post fps in popular games if you have done a similar upgrade with this machine. Thanks!