Nice setup. I went back and forth on the Apple TV vs. Mac Mini decision for about a month. Plex was so enticing after having used XBMC for years and having a Mini readily available sounded great. The more I thought about it though, the more I realized how much extra time I'd have to spend keeping everything running smoothly for my wife and with a baby on the way, I just didn't want to deal with the whole XBMC-type set ups anymore. Not that they are cumbersome once set up but my wife and anyone else who would be at the house would find some way, some how to mess it up. <sigh>
Who knows, I might get one anyway.
Question: you said you control everything with a Harmony? That includes control of the Mini? What Harmony is it?