Acana ALL the way!!
In my opinion, you're getting MUCH better ingredients for probably less money, or equal. I've noticed the RC foods in the Petsmarts, etc, seem to be so expensive and they're tiny little bags. I buy a 5.5lb bag of Acana Prairie Harvest for around $14 here. I prefer to feed Jackson a food that's grain-free and with more meat content, no corn, soy, wheat, byproducts or other fillers. He also prefers it. Other foods I'd suggest are Fromm, Merrick's Before Grain, Nature's Variety Instinct, Orijen, etc.