I purchased a cheap 120 GB (7200 rpm) external firewire drive on ebay, for my Dual 1Ghz G4. The drive worked for about a year, then I noticed it started having trouble getting up to speed and mounting. After a while, it wouldn't mount at all. Recognizing the enclosure as a "kit," I ripped the thing open to find an IBM Deskstar HD inside. While I don't have available drive bays in my G4, I temporarily disconnected one of the internal drives...and to my delight found that there was nothing wrong with the IBM drive. Bonus! My dilemma is that I don't want to purchase the same kind of enclosure that it had, because I don't consider them reliable. However, they seem to be the most popular...and cost around $80-$100. I found a cheaper drive enclosure on ebay for $42, but I don't know if that will prove any more reliable. Any of you have some success in this sort of thing?