More than 8 channels, height channels.
In the time of dolby ex we have gotten a software update quite quickly (and for free)
Now dolby prologic IIZ is out for a while
http://www.dolby.com/us/en/consumer/technology/home-theater/dolby-pro-logic-iiz.htmlSo i would like an extra output card (speakerlink) with 2 front height channels for IIz
I do not think this is usefull for every M owner, as the waf is low for 2 extra speakers in the air. But that same argument was true for 2 extra channels to go from 5.1 to 7.1