I did make an important change, though. Instead of the two terabyte harddrives, I ordered an 8GB CompactFlash card, and a CF-to-IDE adapter. This will result in faster boot times, less power consumption and less noise -- I hope. I expect the components to be delivered with a few days, so that should be nice.
Also, I decided to learn myself how to make chainmail. But it may take a few weeks before I have something to show for that.