IMO Cables should be the last tweak to your system once it is complete. I say complete because 1 high end cable may sound much better than another (possibly cheaper) should you change components later. It's all about total system synergy to get the best out of everything.
That said I recently upgraded my original Nordost Frey SC's to the Ansuz Ceramics. Flipping the cables in pairs I didn't hear anything earth shattering. But when I put one of each in I heard how dry and lean the Nordost sounded.
In conclusion I would recommend a cable that sounds great without breaking the bank until you've decided to call it quits and enjoy the system you have.
That said I recently upgraded my original Nordost Frey SC's to the Ansuz Ceramics. Flipping the cables in pairs I didn't hear anything earth shattering. But when I put one of each in I heard how dry and lean the Nordost sounded.
In conclusion I would recommend a cable that sounds great without breaking the bank until you've decided to call it quits and enjoy the system you have.