Speaker cable for focal scala utopia


Hi, I need help with choosing the right cable for my focal scala v1 speakers.  I am currently using the Synergistic Research Element CTS. It is not bad but I want to tone down the brightness a little bit more if possible. I also have an opportunity to replace the Scala with the Magico Q3, should I take it?  Would it make any improvement?  the Any suggestion would greatly appreciated.  

Amp: Pass 100.5 
myaudio168
I use Audioquest Thunderbird with my Scala EVO. Very smooth. The EVO is smoother then the v1 though. The Magico Q3 is older and Magicos were brighter back then also
Thanks for the suggestion M.  Have you try their Redwood or Firewood series?  I was told they also match well with the scala.  Are you using tube or SS?  I am using SS amp and tube pre. But I doubt they are the cause of my problem. 
In my experience, Purist cables have a smooth presentation, but without loss of detail, but I would finalize my speaker choice before making a significant investment in cables.