Thinking of adding a Iomega Peerless drive, to an old system that does not have a USB bus, as a backup drive. Question is, since I don?ft have USB, I?fll need to install either a USB or Firewire card. I notice the price of the USB cards range from $24 to $78, with this wide price range I figured that maybe there is something I don?ft know about USB. Need some advice. Also, would I be better off going with Firewire?