I'd definitely try the ISOPURE, but in the pre-made bottles. We never could make the powder taste right in that brand. The bottled stuff tastes just like Kool-aid! We love the Alpine Punch flavor.
My wife also has hit uppon a combination she loves: Take one "Diet" or sugar free hot chocolate mix packet, add half a scoop of vanilla protein powder and half a scoop of chocolate, mix with water in a blender. THEN heat it up on the stove. The key is to NOT get it to boiling, otherwise it gets lumpy.
We use Jay Robb's protein that we get locally and is yummy. His site is
JayRobb.com
Voila! Warm, yummy hot cocoa, with 25 grams of protein!