Well, I
was making a reply, but I got sidetracked taking care of Mom.
Actually, Doc said pretty much what I was going to say. Having gone from M22s to M60s myself, I feel, IMHO, there is an improvement, but, only a slight one.
Though I'm not familiar with your current sub and surrounds, I suspect replacing either will provide a greater change than going from M22s to M60s. To me it's a toss up between a new sub and the QS8s.
Though, as you say, the surrounds don't carry that much information, the QS8s are the best surrounds I've ever heard, and I feel safe in saying I'd be surprised if there wasn't a noticeable improvement over you current surrounds.
As far as the sub is concerned, a good one really adds a great deal to the home theater experience. If you are not satisfied with your current one, a superior one could be eye opening.
Once those two improvements are made, if you still feel you'd like to move to the M60s, I'd say go ahead and do so. I was glad I did.
