I am looking to purchase an empty 4 bay external HDD enclosure and am looking for some recommendations. 1) I need it to work well with Time Machine, as that will be its purpose. 2) I don't need any RAID levels, just JBOD, and if possible I'd like one that allows me to use disks of unequal sizes. 3) I want it to match the Mac Pro aesthetically if possible. I will prefer to connect it via FireWire 800: eSATA is a bonus but not a requirement. 4) Obviously I want as inexpensive a solution as I can get, but I want it to be long-lasting and well made. 5) In a perfect world, I'd love it to auto-power-on when the computer boots and auto-power-off when the computer is shut down, like the Lacie d2 drives do (but I know that's unlikely unless I go with LaCie themselves). I know it's a long list of features, but I'd love to hear some recommendations even if they don't fit all the points.