Thank you for asking, next step with the Kii set up is to add two rear channels, we have just taken on PSI active loudspeakers, Christoph uses them in his lab, the rears can be smaller A-17m and then three height channels two at the front and one at the rear, or all three at the front as space is a bit of an issue.
The Illusonic can separate,direct, reflected and ambient sound so splits the output to the various loudspeakers, to create an 'immersive' sound , there are a couple of cinema processors that use the same sort of tech.
I believe there is some native multi channel music available from 2L and Channel Islands, I might give that a whirl too.
Keith.