This topic has been beaten to death. Basically it's comparable to video game consoles. You don't buy consoles based on a spec sheet, but on the type of games you like. You don't choose the interface based on a tech sheet, you base it on the drives you plan on using. The interface means little to nothing. If you want the fastest drives available, go SCSI, if you want bang for buck, go IDE, if you want small cables, wait for SATA.