When people start to argue over weather that can hear the deference in the sound, just by the speaker wire that is used, my BS meter alarm goes off.
This is a sensitive topic, and can get you band if you don’t drink the Kool-Aid.
Blind test have been done over the years and the results were very shocking to say the least.
As long as the gage is correct for the wattage you’re using is observed, and it's a high percentage pure copper is used you’ll be happy.
I’ve done test and I can’t tell the deference in a high dollar set, or just plane zip cord. So I just use zip cord.
On my big PA system I run 2000 watts through a 12 gage wire at some pretty long runs, up to 100 feet, with no problem.
If you want to spend your money on something that has the least affect on the outcome then i wont argue with you.
But I would start with just zip cord and let you be your own judge.