One thing to keep in mind if you are running the M22's without center channel... if the center is below the TV then when it is on you will probably find the sound moves down compared to when you are running M22's only.
If you were running M80s with center and M22s without that would add another variable you probably want to keep out while you are making decisions.
If the M5HP vs M60HP question is for an HT system where the subs will always (or at least almost always) be used then I don't think you would hear much difference between M5 and M60 as long as they are set to "small".
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8
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