It always depends on speakers, amplifier etc.
On my Tannoy I use a custom made ViaBlue 2 x 8 sqmm Bi-Wire cable. Didn't find a better cable for them!
The same cable doesn't sound good with the ProAc Tablette 8, which worked much better with genuine cables (similar to QED but transported isolation) or, even better, solid core cable. But these two cables didn't work very well with the Tannoy.
But for every system there is a better solution than QED 79, perhaps even a much better one.
Try, listen and feel!