I wont comment subjectively as there are many solutions in the cable argument. BUT what is mostly misunderstood is the importance of interface. Just think of the cable as another component in the circuit design, it just happens to be an interface component. AND as such it is load and matching that is the priority.
I design cable to be a neutral load, non filtering and as wide open as I can make it (the same design criteria applies to the interconnects). This is perfect for NVA amps as they are a simple circuit and no filtering or compensation in the output. Most amplifiers are not! most have at least a zobel network or in the case of valve amps output transformers. Capacitive and inductive output filters. This anomaly is mostly applied in order to get unconditionally stable amplifiers, which bizarrely has created an inverse anomaly of cable designed to compensate for the applied amplifier compensation. Hence the appearance of cable of Litz type design or Goetz. These are fine cables in the right context in the job they are designed to do but give them to an NVA amp and others like them with straight through uncompensated outputs and you will get smoke very quickly and speaker frying voltage rail on the output. The reason - they create a virtual short circuit load at above 30k. A filtered amp is not working up there, but some are. The situation is similar for Naim and Exposure type amps but they are more influenced by the inductive element where as NVA doesn't like the capacitive element. We recently did a version of the cable more suitable for the Naim / Exposure type of design designated LS3.
So the long and the short of it is like everything else there is no best cable, there is the most appropriate interface.
NVA cable will never harm an amp, the worst affect is it will make some systems sound a little flat. But the cables were the first items back into production last year and we have only had a couple of sets returned.
This whole Hi-Fi game is a real can of worms, you change a cable - it is better, so that is now *your* best cable - not necessarily! keep an open mind, solutions are system not component based.
I have an evening off from teaching so I am indulging myself, it is unlikely I will be a regular here, but I will try to contribute as time and incentive allows.
Richard