Your go to Whey Protein Isolate

Need suggestions on Whey Protein Isolate rather than the concentrated Whey. Also, with the right amount of Amino Acids which Creatine supplements have helped you keep your energy up? I have been drinking C4 zero sugar energy drinks and need to get away/add variety. The caffeine content is not what I'm looking for. It's the Cognizin Citicoline which is the neurologic nutrient to stimulate the most of the mental energy.