Mainly the fact that I "needed" a new machine sooner rather than later. Long story short: I use this computer to run Plex Media Server, and my current mini is not capable of transcoding the number of simultaneous 1080p video streams I require.
I seriously considered a Windows build based on either the i7-4770 or i7-3930k; however, the current mini proved to be the path of least resistance. I can simply clone the hard drive on the old mini, stick it on the new one, and be done with it.
Hm yes i see