I paid 68 for a case and a 80GB drive, the case works on Firewire and USB2 though i use the firewire as i had a few provlems with the usb on an older drive.....i did look at a site that had done some tests, i can't recall the address but it ended up that the firewires was about 98% as fast as an internal and usb2 was about 96% so nothing we'd notice in use.....previous drives i've used have been smaller ones used to back up, whereas this one is to run poser on, i've only been using it a short while but so far i'm very happy.......the catches, just one, its noisy it has fan on the back and the old alloy cased one seemed to echo the nois of the hd it was an old drive though......Steve