I got a system 4 months ago with M22 x2, QS8 x2 and VP150. I added HSU-2 sub. The room is 22'x16'with two storey ceilings and opening into a breakfast area and kitchen. I debated a lot and got the M22s based on space and WAF constraints. I am happy with the sound, but I think I am having the M22 remorse now. My brother-in-law wanted to buy a system, and I strongly recommended the M60s since he did not have any space constraints. He is very happy with them. I am visiting him this week, and I am convinced that I will feel awful for having gotten the M22s. I am going to brace myself and take the m22s to his house and compare them, but I already see what is coming.
My questions are, should I get the M60s making some adjustments to the TV placement? Do I need M80s? If I get the towers, what should I do with the M22s? I could use them for rear speakers in a 7.1 setup, but is that overkill?
Here's my setup.
Ravi's Setup

Ravi
Axiom M22 front
QS8 surrounds
VP150 center
HSU-2 sub
Samsung HLN61W TV
HK-525 receiver
Panasonuc Cp-72 DVD player