I would suggest a base Mac Mini. I have a base i5 one as well as the i3 NUC, and the mini fans are quieter under similar load than the NUC. It also seems to be a bit more powerful than the NUC, but still in same ballpark (my mini is a 2011 Sandybridge). When you throw in the capability to have up to two 2.5 drives, the built in ports including thunderbolt, no power brick (internal PSU), I'll buy another mini before another NUC of this particular configuration. I love 'em both, but if you need built in FW800, the mini a good candidate, even if it will never see OSX and just run Windows.