Years ago I purchased this "American Cable" brand Speaker cables from a local Music Store called Victor Litz. All thick 12 guage. I purchased a bunch of 1/4 inch cables back in 2000. I still have those cables today, and they work GREAT still. 17 years old almost!
The first 4 XLR Cables I purchased were Livewire brand at GC. All still work so far. I also have purchased cheaper cables off of Ebay from Monoprice. The Cheaper cables are thinner than Livewire brand, but seem to do the job fine.