PCs. You may have a 3000Mhz CPU, and an 800Mhz FSB, and 1GB of ram, and the fastest graphics card money can buy, but your hard drive is still slowing everything down, which is why I think it's important to spend as much money as possible on a fast IDE hard drive with 8mb cache, and 7,200rpm. (or maybe think about SATA, or SCSI) more about performance here. some of the other stuff on that site's quite good too.