Every man has his own taste .
Briefly the Denon D5200 has a light sound signature ( Ididn't like the bass in them, it was slow )

Denon D9200 has a very bright sound, if you listen to old music or rock records it's cool, but for modern house is too much treble ). Therefore, they are obiviously for fans, but the sound very detailed. Bass is deep and beautiful, the most beatiful among the three .

And finally Denon D7200 on it any music soft warm. The darknest sound among the three, but i like it. Treble they are muted and don't saw the brain so that the blood runs from the ears.
In general my favorite sound signature.