Upgrading from TMC speaker cables- to what???

I am wondering what I can replace my TMC speaker cables with. Wish to make quantum leaps in performance as new speakers coming are deserving it (Wilson Maxx3's)

Weird situation is- length of speaker cable run is 25 feet!

Has anyone replaced TMC Golds out there? With what?

I have a feeling these are performing well, and don't want to waste $$$ to hear no audible difference.

Where would I have to go in the PURIST line to hear a difference from these existing cables in my system?

Thanks, in advance.

John