Designer is by far the best quality whey protein, but ot os not always the most cost effective. Optimum is probably the best buy, and it is up there in quality. If you are looking for a protein blend, opt fot met-rx APM 60 or optimum pro complex)new formula). Blends have a time released effect, so they will keep you in positive nitrogen balance for a longer period of time, so essentially they are better for bulking. When trying to cut, go with a whey...it has a higher BCAA content and a better amino acid profile, but your body will utilize it quicker, so it needs to be taken more often.