I have only used 16awg and 12awg OFC copper bought at AUD$2.00 off the reel and bare wired it to amp and speakers. To my ears, my system sounds wonderful, clear piano keys tinkle, beautiful clear sopranos, grunge reverb guitar, and all the detail one can expect from a live recording. My system isn't worth $5000, but by gum it sounds good.
Snake oil ultra expensive wire is for those who want to show everyone that they are an "audiophile". I challenge anyone to replace my wire and make my system sound better...