In the past (I'm pretty sure it's still the case) Marantz line cannot apply Audyssey to bitstreamed codecs. Denon can do it across the board. So if you like Audyssey room correction, Denon is a better choice.

If you do decide on the Marantz, make sure your model can update the FW online.

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Denon 4520, EPIC80/500/VP180 Speakers