I went with a new Mac Mini with i7 and Intel HD 4000 graphics a few weeks ago. (16GB RAM and I upgraded to 256GB SSD) It works great with Boot Camp for Windows 8 Media Center. I'm using USB 3.0 3TB hard drive for recorded TV storage.
I kept the Zbox ID82, it's now my Windows Home Server connected to two USB 3.0 ProMedia 3TB 4-bay enclosures.
Mac Mini (Late 2012, Ivy i7-3615QM/Intel HD 4000) Win 8 Pro x64 Media Center, 2 USB Ceton InfiniTV tuners + Companion iPhone App, XBox extender, MyMovies.dk WHS 2011 StableBit DrivePool, TIP: (DISABLE Intel Graphics Control Panel's Dynamic Contrast to prevent 29/59 flicker)