None of the above.....(emphatically so, if you are using subwoofers in your set-up).
Audyssey Pro 32XT is --IMHO-- the dispositive difference maker among AVRs in this class. Integra, Denon and Onkyo all offer it, Marantz (as near as I can figure from the Marantz and Audyssey web sites) only offers an older iteration of Audyssey. Whatever other distinctions may (or may not) exist among these models are likely - IME - to be audibly less significant than the DRC software, particularly if that software is also generating the crossover function to integrate subwoofers.
Marty
Audyssey Pro 32XT is --IMHO-- the dispositive difference maker among AVRs in this class. Integra, Denon and Onkyo all offer it, Marantz (as near as I can figure from the Marantz and Audyssey web sites) only offers an older iteration of Audyssey. Whatever other distinctions may (or may not) exist among these models are likely - IME - to be audibly less significant than the DRC software, particularly if that software is also generating the crossover function to integrate subwoofers.
Marty