Audioquest or Kimber kable.

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.

As someone who lives in Germany, american cable manufacturers were "terra incognita" for me. When I configured a vintage system with Mark Levinson components and Infinity speakers I felt there should also be cables made in the USA. Thanks to Audiogon I discovered Silnote Audio - those cables are spectacular even in the budget Morpheus range. Also worth looking: Morrow Audio.
My latest speaker cable for testing (I write for a German High End magazine) was the stellar Audio Quest "William Tell". Not the cheapest piece of copper but a sonic revelation and close to In-Akustik 's Air cables that cost trice the price of those Audio Quest speaker cables. After all keep in mind that interconnects and speaker cables should be regarded as a whole. The system in my sleeping room (a Sony SACD with a Trigon "Snowwhite" preamp, a small Audiolab amp and Kef LS50) is connected with Morrow cables. Those low capacity connectors enhance the openess and definition of the system. If I want more bass I choose Audio Quest.
Hope I could give you some hints.

Greetz, Hans

Yeah I am definitely coming around to looking at other options. I have the option of just taking the cash offer for my speakers and looking somewhere else for cables.  Not knowing enough I thought it would be easier to buy from the same place I was selling to.  Now I will be looking at the ideas all of yall have given me and make a decision from that. 

Kimber Carbon series just came out & the MXL & BFXL have just been redone. Very mice stuff.  Select is even better.