10' speaker cables

Transparent Music Wave or Cardas Clear Sky. The later will be slightly more musical and warm. The Ayre is very natural and musical the KEF can be a bit detailed so the bit of warmth with the Cardas would probably strike the balance. 

Given your components a reasonable budget is around $1K to get the most out of your system... assuming no weaknesses upstream. 

Zavfino Nova 12 AWG OCC... they have 3 meters available....

https://zavfinousa.com/collections/speaker-cables/products/nova-speaker-cable

I've been slowly converting my assorted cables to be all Veritas. I love the ones I have and just picked up more. I'm waiting for a set of their Aperta SE speaker cables now. 

Not nearly enough info.  What are you using now, what improvements are you looking for and what sound characteristics are most important to you?  Also, what’s your budget and are you looking for new or used?

The last time I was in the market for new speaker cables was over 15 years ago.  At the time, after intense auditioning, I purchased JPS Labs Superconductor 3 speakers cables, and I haven't felt a need to replace them since. The JPS Labs Superconductor 3  checked all the boxes then, and they continue to check all the boxes for me to this very day.  Since then, I've been through several main audio systems, and changed all other cabling several time over, but the JPS Labs Superconductor 3 speaker cables remain.  Phenomenal speaker cables!!!!  Happy listening.