"What the heart wants, and you can afford it, go for it I always say."
Best advice while engaged in audio as a hobby.
"I’m curious what motivated you to spend something like 3 times the cost of your speakers on cables (assuming I’ve got the cost/math in the ballpark), rather than invest in maybe end-game speakers first?"
The retailer maybe had no knowledge of the OP’s setup, since their claim is to "treat it as their own.’
No amount of "magic cable" can replace compromised speaker setup as well. Focal 936 are quite good.
Focal 936 and associated gear is a Heimdall/Frey at best application(that’s a stretch) Real sonic improvement would be speaker placent/room before cable investment-based on the OP’s pic.
Nordost user here.