Mahesh,

Nice to read another positive report on the M22.

If it were me, I would go get the M60s, and try both the options (2) and (3). In my sense, it would be much more fun to have the DIFFERENT pairs of speakers in the two rooms. Plus, getting the M60 will literally give you more choice now, i.e., only (1) vs. (2) or (3), and in the future when you feel like some change or when you move.