@holmz
It’s difficult to understand what you are targeting when your OP says “high end digital” (what does this mean to you?) and it appears you have not stated a budget.
Generally speaking, digital audio playback requires a server(where music files stored)> streamer(transportation/delivery of music files) > DAC (translates files to an audio signal). If you want to spin SACD/CDs, you’ll also need a transport.
A CD player has both a transport and DAC built in. In high-end audio, for best performance it is generally better to separate the functions to better isolate components from vibrations and electrical noise but costs more in casework and additional cables. Also, usually a DAC+transport is significantly sonically better than a CD player unless you spend considerable $ for a higher quality player. For greater flexibility (upgrades), better performance, and lower cost, most high-end digital systems have a stand alone DAC vs a CD player.
It’s difficult to understand what you are targeting when your OP says “high end digital” (what does this mean to you?) and it appears you have not stated a budget.
Generally speaking, digital audio playback requires a server(where music files stored)> streamer(transportation/delivery of music files) > DAC (translates files to an audio signal). If you want to spin SACD/CDs, you’ll also need a transport.
A CD player has both a transport and DAC built in. In high-end audio, for best performance it is generally better to separate the functions to better isolate components from vibrations and electrical noise but costs more in casework and additional cables. Also, usually a DAC+transport is significantly sonically better than a CD player unless you spend considerable $ for a higher quality player. For greater flexibility (upgrades), better performance, and lower cost, most high-end digital systems have a stand alone DAC vs a CD player.