The only improvement would be in loading times for your levels etc... so unless you're using your system for a Network base or CAD or something with many file swapping, you won't notice much difference. I wouldn't put my money there. Those 10000 RPM drives are much more expensive than 7200 and give you the speed of a medium SCSI drive. Change your 9200SE card in your system 2 instead. You can read more at tom's hardware or at anandtech.