Marantz NA 7400

Does anyone have experience with it? I'd like to upgrade my source. I am using an Airport Express into a Moon 100 D. I was considering adding a Synchromesh and using a Sonos. But this solution supports AirPlay. Is the DAC in the Marantz good? Or would using the synchromesh and Moon 100 d with the Marantz still be better? Thanks for any insight.