That won't work on the Mibox. The Z607 have 5.1 via RCA cables. For the Mibox you'd have to have an hdmi or spdif system
For watching sport and the odd documentary, I use a JBL 2 Sound Bar with optic connection to my LIT TV box, and a 22 inch Samsung monitor.
Works fantastic, for that, for music I stick to my Headphone setup, or Stereo system.
Mi-box in lounge is connected to a Setreo System.
For 3k, I 'd recommend the JBL 2.1 soundbar, as long as you are not going to expect to get good stereo sound out of it. For Movies, sports documentaries, and other audio visual material it will go loud, sound decent and hopefully you will enjoy.
If you can listen first, it would be better.