Hi, My current system is as follows-- P4 2.0Ghz 512cahce -- Stock heatsink/fan 512mb 2700ddr 80.0 gb WD 7200rpm 8mb cache Aopen Ax4b Pro-533 Geforce 3 Ti 200128mb 16x pioneer slot loading dvd Sony 24x 10x 40x burner built in sound 2.1 Labtec Speakers Microsoft intelli mouse explorer v 1.0 17" Nec Multisync 75 300watt generic psu. (i know, not good) Generic Case (black) What do you guys think about Microsofts bluetooth mouse? Its $85, and i dont know if its worth it, but i need a bigger mouse and my current mouse is started to ware out. My question is based on my specs above what parts would you recomend upgrading for some serious gaming? I plan on playing Half-Life 2 and perhaps Doom 3. At the present time i think taht a Radeon 9700pro and an audigy 2 would be a start. Also, i think some nice 4.1 or 5.1 speakers would be nice, but im on a limited budget... so, not necesarry. With these two additions i would need a new psu. Im looking at maybe one of those enermax 430 or some equivilent. Any suggestions?? In addtion to these hardware upgrades, im looking at spicing my system up with some cosmetic changes, like new case,,,,previous post,,, glowing fans, and anything you guys may suggest, *note i dont have a case window so no internal lights. Thx for your assistance.