Music Server for feeding Theta Gen VIII DAC

I've been away from audio for a number of years after putting together a system* that I was mostly satisfied with.  I took the system apart for a couple years for a living room remodel, then shortly after I set it up, my SOny ES CD player I was using as a transport died.  I now realize that I no longer know how to play music.  I would like to use some sort of computer server rather than a disc spinner for the convenience, but am overwhelmed by the choices available.  I want something simple with excellent sound quality.  Right now, I mainly want to rip my CDs to a hard drive.  I recognize that at some point in the future, I may want to use some sort of streaming, but right now, I'm not interested.  Having been to a few shops, candidates include the Cambridge CXN V2, Aurender N100C, and Naim Uniti Core.  The Aurender seems hobbled by a new change that sacrifices sound quality of non-MQA files, the Naim seems like it can't accept files downloaded from the internet.  The Cambridge seems to not have any identified problems, but I wonder if it's possible for a machine that is so affordable to provide sound quality on par with the others (although if it can, that would be great).  I have no idea what to do.
*Theta Gen VIII s3 DAC/Pre, AtmaSphere MA1 amps, Ascendo ZF3 speakers, Kubala-Sosna EMotion interconnects, Entec LF-20 subwoofers.