Oddly, while I have not seen AC/DC, I did see Peter Murphy when he was on his above stretching tour. 1990 or so? I didn't know who he was, but a friend had an extra ticket.
Does this sit in a closet, or is it furniture? Cause if it can be ugly then you can get a small server with more power for less money. Any version of *nix will run all the things you want without much trouble. I run a headless TS440 with Vortexbox/Fedora and it does everything you mention.