Welcome to the forum!

For the surround, I would stick to the QS as they will do a much better job at it. Few people commented that going from 5.1 to 7.1 with the QS8 was only a minor improvement. They are that good.

As for the M22s with the VP180, I am not aware of anybody that tried this configuration but I would guess they would be a good tonal match.

Bruno
M80s/VP180/QS8s/EP600/AVR-890
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"The problem is choice..."