I use this:
http://www.amazon.com/Natures-Life-S...sim_sbs_hpc_21
I buy mine at my grocery store. It also comes in vanilla bean flavor. 130 calories, 1 g fat, 11 carbs, 5 g fiber, less than 1 g sugar.
tastes ok to me
I blend mine with unsweetened almond milk, cinnamon, and strawberries. 25 g protein.
I like the fact that there is no fake sweeteners in there--they make me really queasy. Hope that helps!