Deck, another welcome. Any of the receivers that you're considering would be fine, so if you can't decide on the basis of features let price be your guide. As to the speakers, if you're going to delay getting a full setup, I'd suggest that you get the QS surrounds rather than the center speaker, since your M80s could at least temporarily serve to form a "phantom" center, while the QSs would substantially contribute immediately to your enjoyment of both music and movies.

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Enjoy the music, not the equipment.