Cable Quest

You should try Kubala-Sosna.  I ended up going with their top-of-the line Realization series.  Power bables, speaker and digital.  Beat out the best Synergistic, Nordost, Audioquest, Siltech, Crystal and Bibacord.  Incredible focus, soundstage, dynamics and transparency.  I can’t stop listening to my rig.

And they’ve got several series at different price points.

I've gone through Analysis Plus, Kimber, Audioquest, and Tellurium Q. After having the Tellurium Q for eight or so years, I changed to Audience Front Row completely throughout my system. Very nice cables sound and flexibility wise. This is my stopping point.

@bzawa I admittedly don't have as extensive experience with cables as some here. I will say this though: IMHO there IS a difference. 

After several decades with Monster Powerline II and Monster Reference interconnects, I decided to dip my toe into some new cables. After a bit of surfing around, reading reviews etc. I chose these folks: https://www.morrowaudio.com/

What I liked about them is the ability to have the cables built and configured as you want them. (They also have a trade-in program) Before I rewired my system, I had a good long listening session with familiar material so I'd have fresh memories to work from.

After I rewired things, I was gobsmacked at the difference. It was not subtle! I was skeptical about their 'break in period' (Really? For wire?) But again, I was surprised at the further improvement over time. To be sure, I swapped back to my old cables to make sure it wasn't confirmation bias at play and was amazed again: There really is a difference.

I'm not going to go into the differences I heard on my specific system as if you think about it, your system will behave differently than mine. What I am trying to do is to encourage you to give new cables a try. The suggestion of buying used is a good one: You can likely get very good cables for way less than new. And if you don't like them, or you can't discern any change, you can always sell them on.

Give it a try. I don't think you'll be sorry!

Happy listening.

@soix well I have tried these very expensive stuff from acquaintances and friends and I had to do it blind just to remove the visual bias stimuli and nopes didn't hear anything so for me specifically overly expensive cables are wasted on me. Also I'm most likely getting an all Active setup soon from the Genelec the One Series so speaker cables will be wasted on me regardless