Only the computers, TV etc I only keep on when I am using it.
For audio, I plan on using squeezeslaves with usb sound cards, lower foot print, honestly do not have any MD's at this time, used my sons machine once to help with an issue, but it was temporary.
Have a PI, which uses around 5W, that has Raspbmc, which I plan to put on LNMCE, when it becomes available.
Also a WD LIVE player, I did not check consumption, think the manufacturer rates it at 15W, but this is powered off when not in use, not controlled by LNMCE as yet.
I normally try to go with the most efficient equipment I can afford, in all aspects of my purchases.