Since your system is centered around litz type cable, most any cable should move the tonal response of your system toward the mid or the lows as the small gauge of the litz wire provide a more linear resistance than a larger gauge conductor witch provide more emphasis on the lower end. Hi you select a cable made of conductor of large diameter (16 to 12 gauge of individual conductor) you may find that the highs are missing.
Also as the litz wire have a lot of dielectric material (as all the small wires are individually insulated) any cable upgrade with a cable having an air dielectric will provide more details and a faster sound with more impact.