Speaker cable thoughts

Don't know if you considered this. How about going up the MAC speaker cable ladder? Get the more expensive Silver AG or MAC Shotguns. I'm sure Steve from MAC would work with you as you are a returning customer. He would also know what would work well with the Mystic Balanced ICs you've got.

Good luck with the search.

I recommend Acoustic Zen Zatoris or Hologram. These come up fairly regularly. These are not 'budget' cables (not that there's anything wrong with that).

What is it that you don't like about your present cables?