Speaker Cable Upgrade... Advice Please

its true, I am accustomed to the tube sound, and it’s true, the Devialet is a bit brighter than the ARC gear I had.  There are a few reasons for the switch.  I am moving to Europe so I will be in the land of 240v power, and will be down sizing homes by a factor of 35%!

I wasn’t interested in having all the voltage requirements changed on my gear, and I was ready for a smaller system.  I listened to the Devialet in my home and I was pleasantly surprised... it sounded different but fantastic.  Perhaps mine needs more burn in. Perhaps I can utilize the internal tone controls, or the DSP in Roon (for the digital source anyway).

so, lastly, if I’m looking for the benefits of better speaker cables, perhaps sticking with Cardas is the way to go? I certainly don’t want to brighten up the system! What other speaker cables are also warm and laid back?

I can only speak to the Cardas model lines Clear, Clear Beyond and Clear Beyond XL (PCs only). As I moved up this chain the sound has not gotten "warmer". Resolution has increased without sacrificing neutrality or pushing the sound toward "brightness".

From working in high end audio some years ago, I remember that Wilson Audio used Transparent Audio cables for the design, voicing, and internal wiring of their speakers. Also, they always used Transparent Audio cables in the displays at shows. I would contact them to verify this is still true. It just makes common sense to use Transparent Audio.

I use Acoustic Zen Hollogram lls with my Wilson Sophias, amps used with these are VTL MB125s, Quicksilver M120s and a Pass Labs XA30.5. I have used the Cardas Cross, my back up cables, with all these combinations so am familiar with their sound. Please note that the AZ Holograms are designed for biwire configurations and the AZ Satorie are designed for single wire applications but have not heard them.

What other speaker cables are also warm and laid back?

From my experiences, older Cardas cables are warmer sounding. Cardas Golden or Golden Reference may work.

Other manufacturers who may help take the edge off:
Purist Audio
Kubala Sosna
Jena Labs

From my experiences with Nordost, they would provide the opposite of what you are trying to accomplish.