GM, welcome. The 606 or any other similar receiver should be more than adequate in your room with any of the speakers you mention.

You should also add the M22s to the speakers that you're considering. They have superb performance(study the SoundStage review and NRC measurements here )except in the very lowest bass, and are adequate for most music(excluding pipe organ)without a sub. Of course, adding a small sub would be desirable, but not essential, for more output in the lowest two octaves.

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Enjoy the music, not the equipment.