I recommend a streamer with a fibre optic option. A Lumin X1 DAC/streamer or their brand-new streamer based on the X1. It is not cheap.
I compared my much cheaper Sonore OpticalRendu with the Lumin X1 using fibre for both, and they sounded different, but none was better than the other. I sold the X1 and kept the cheaper OtpicalRendu.
There is a new streamer from Aurelic that looks amazing, except it does not have the fibre input I covet.
I may actually sell one of my OpticalRendu’s to get the Aries S1 since it can do more than 1 DAC at a time. I have 2 DACs in my office. It can also play CD’s using a computer quality CD drive. It has a buffering technique that renders the transport benign. I may go with the $1999 version since I did not find a big improvement with the audiophile upgrades to the OpticalRendu.
I should add that I just sold my Playback Designs Stream-IF that did not have Fibre input, just Ethernet. I was shocked at how good that sounded on SPDIF. I was not able to test the better fibre optic output of that unit. I compared the 3 streamers I mentioned side-by-side and all 3 sounded different. I cannot say anyone of them was the best.