Depends on how you use it. You don't say, but is the mini your main computer or an extension of another computer that manages your iTunes library? If the latter, the ATV can do most of what you get now in an easier to control environment, while consuming only 1-6 watts. The ATV also shows up as a location you can play audio and video content to from the remote app which the mini can't do if it's an additional client. Otherwise, the mini is obviously far more flexible, but the ATV packs an awful lot into that small box.