Hi @emil, I agree with @audphile1 here and have also avoided Fiber for those reasons. Plenty report it either is or is not an improvement. I recommend the Acoustic Network's filter. I have the Muon and it made an immediate improvement, and does not have to be plugged in, which I find a big advantage for all the possible noise, switching power supplies, and space and clutter.
I also upgraded to a Silent Angle Bonn 8 switch. This was less impactful for me. It is available as I have just upgraded my switch to a JCAT M12 Gold which is amazing a clearly an upgrade, but much more $.
Ignore the naysayers. Let us know how the fiber sounds!