Very nice build there! Question though: Have you measured how much power it consumes when idle and when under load?

That's been my main thing holding me back from building a beefed up home server/NAS box. Friend of mine used to have an all-in-one HTPC/NAS/webserver box that would put close to $30 a month on his electricity bill. (Although you could argue he needed to run the heater less as a result..)