i'm buying my 5.1 system later today. at bestbuy, i can buy 20ft of white speaker wires for $15, but at walmart, I can get 50 ft regular speaker wire for $10. walmart's roll is 14gauge. bestbuy's site did not say what the white speaker cable's guage is. the brand at bestbuy is Monster Cable (oooo). The walmart one is royal (i think its some generic company). what should i get?