Muscle Tech is good but it's way over priced. Don't go to GNC. Buy online at Bodybuilding.com. It's 1/2 the price than at GNC and it's reputable. Lots of great articles there too. This is good protein for cheap. I drink about 4 of them a day.
Check it out here. Good stuff and super cheap.
http://bodybuilding.com/store/opt/whey.html