Audioquest or Kimber kable.

Kimber 8's.  Biwire 3/5 treble bass.

Bill Low personally recommended "33s" to me (for bi-wiring) at a local audio shop a couple of years ago, and I liked them...when I went back to single wire I switched back to a pair of Type 8s...Audio Advisor has been selling those for a while (I got mine used from a private source) at a fairly amazing discount and they’re great sounding cables.

Hi , audioquest makes very good cables . They van be stiff tho. Just to put another very good and reasonably priced cable for your consideration; Tellurium q black . Tellurium is a multi award winning cable maker. The T black is in their lower priced ranged but extremely good. Cheers Leon 

Yeah, now this stuff can get emotive, not so? 🤔 
As for myself its a bit like arguing about motorcars, as mentioned earlier. 

I had some repeated minor, shorter term encounters with both brands.
Yes, both can be kind of stiff, plus in my recollections they have this 'so what' factor. Nice looking too, and then so what? 🤔 

More or less, and by sheer accident, I now wound up with Transparent XLR cables for transport to DAC, and pre- to power-amp. 

Not short for any long term testing, loads of testing, both can not be bettered by anything that I had before, and still have.
No BIG deal - but one, if one cares to listen 'deeply' turning out to be for keeps.
AND... I'm not talking about their latest expensive offerings either, i.e. an older Music Link Ultra to the poweramp and a digital Reference to my DAC. 
Maybe I was lucky to acquire them at an affordable price?
In any case the Ultra is nicely flexible, the Reference however -far from it- just to mention it. 
Michélle 🇿🇦 

OP I know you said you were looking at those brands as part of some kind of trade-in part-exchange deal, but you should really look at Audio Envy, as I think someone else has already suggested.