I have my Server Pink faun 2.16X hookup to the router by fiber since a few time by a multimode fibre and convertors in witch end. But now I made an upgrade using a singlemode fibre hookup directly to the server via a NIC (network interface card) with modules SFP+ for 10G power supplied by an inside server carrier of LPS. On the other end i hookup the router and the converter power supplied by a farad LPS (with super capacitors) and between the router and the converter a Cooper RJ45 cat.6 (Shielded twisted pair cable (STP) ) of 15cm to does't infected easily by EMI and RFI. What I can say is that I can't be able to distinguish the music files from the streaming, the SQ of the streaming is amazing. Next think to do is swap the router with one with a 10G out of internet, that it seems came to the market for the next year, and with it all the network path will be isolated from noise. About the jitter on fibre I don't worry about it because the server has a Pink Faun ultra OXCO that eliminate the jitter that can exist.
Previously had Switchs, like EtherRegen with a external clock, a filter ENO and even the SOTM snh-10G W/CLK for a month. They offer a sound clean but artificial. I came on the conclusion that nothing better than to treat the problem on the origen and the sound it will be cleaner and natural.