A solid whey protein isolate if the $ can allow it. I now just take regular dymatize whey complex (just a mixture of isolate and concentrate) before a workout and gf pro 9isolate) afterward if I have it on hand. I find that unless your really dialing in on a low bf, on a low carb diet, or need it for health reasons that a brand name whey mixture offers the same benefits as a higher priced custom mixture (that could just be my money saving tactics putting binders on though :blink: )