Okay, so shock of shocks, that I am starting a thread in the buying tips section... But hopefully it's Sunday night and no one wants to think about work in the morning. Here is the scenario. My Mac has a failed SATA controller. I figured out that this was the issue preventing booting (and that the drive, 7200RPM 160GB, was perfectly fine) and got an Icy Dock MB559UEA-1S ($65 shipped, 3.5" enclosure, SATA-I/II, FW400 and USB2) and put the drive into it. Now, this really reinforces the fact that I need a backup device for this computer. Which means I need another enclosure. Here is the dilemma: Option 1: Buy a really nice SATA drive (like a 7200RPM / 750GB Barracuda) and another Icy Dock, cost about $270. At some point then, as I have far less than 750GB of stuff, I can transition this to being the primary drive and the 160GB for user directory backups, and then ultimately get another 750GB drive or 1TB drive for backup, so that I complete the process of getting to a much larger HD size, which I had wanted to do at some point (and I always would've needed two 750GB drives to do this; just now, I need two enclosures as well). Option 2: Go for a much cheaper two-drive pre-built enclosure. There's a 750GB Western Digital kit for $180 through 9/1 (link), but it seems (1) to use two drives, which are (2) probably PATA, and (3) uses only USB2, so it will likely never be anything better than a backup drive. Option 3: Conclude that pricing of 750GB drives is still not favorable, and perhaps get the Icy Dock with a 500GB Barracuda ($180, or $90 less than opt 1). This would be one still fairly nice drive, and a nicer enclosure, but a smaller volume. Or other options? Thoughts?