I doubt you will hear a difference. But if you will feel better, and want bragging rights, buy a couple 8 ga PC’s.
so, you have 8ga from your box :) to outlets,?…..I would probably grab a medium cost 8ga cords, more money does not mean 10x better.
use your best judgement.
years ago, I bought 30feet of 8ga speaker cable, I have to cut them to fit in the banana plugs.