Is that denon a well respected model then?
DCD-2500NE was their flagship until the release of their 110th anniversary model DCD-A110. Both models have great DACs inside, so you connect directly to your preamp or to your integrated. Indeed, they have a lot in common.
Denon DCD-A110/PMA-A110 SACD Player/Amplifier | Hi-Fi News (hifinews.com)
Re the denon dcd-2500ne - does anyone know if CDs/SACDs ae played direct from the disc, but WAV/DSD files on DVD are somehow stored in a RAM buffer or similar?
No technical experience here, but it is a very good player if you have a good integrated or a good pre and power.