Hi MABabs,
Although the M22ti was not designed to be used on its side, it still sounds remarkably good in that orientation--better than an M2i used vertically. The worst thing would be to put the M22s on a shelf inside the wall unit. I presume you were thinking of putting M22s on their sides (position the tweeters to the inside) on top, right? Why can't you put the M22ti's on stands to each side or a bit in front of the wall unit?
Another option would be to get three VP150s and the QS8s.
Regards,
