Why would you get disc player just to use its DAC? If you don't need a transport, for a relatively modest price you can get a Cambridge Audio DACmagic Plus. I've been using one with my old CD player and its pretty decent. I just replaced the wall wart that came with the unit with a regulated linear DC power supply and it gave it a nice little boost in dynamics.
Looking for a Cheap DAC?
http://archimago.blogspot.com/2017/05/measurements-smsl-idea-usb-dac.html#more
this looks encouraging...
this looks encouraging...