Just looking for a quality whey protein for post-workout, etc. I've heard nothing but good things about the Optimum Nutrition brand until I walked into a GNC store. The sales guy then proceeded to tell me that most of Optimum Nutrition is a whey concentrate and tried to direct me to a wheybolic extreme or some other whey product with the GNC label on it. But it seemed as if there were a lot more of the artificial additives with the GNC products compared to the ON brand? To make even things more confusing, I read somewhere on yahoo answers that Optimum Nutrition actually makes all of GNC's protein products. Can someone sort through all the mess and just tell me what is going on? I'm just trying to find a quality protein for the best value.