Caimen, welcome. Your selection of speakers seems fine, but If you possibly can place a vertical M22(or even M2)center, that should be considered.

You haven't described your room, but if you meant to say that the separation between the L and R M22s would only be about 6', this would be satisfactory if you weren't sitting more than about 10' away. A common recommendation is that the listener be about as far away as the front speakers are separated.

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Enjoy the music, not the equipment.