Gym goers, what's the best value whey protein right now?

So have decided to return to the gym after a long hiatus and needing to get some whey protein. I've read stuff about leucine content and now I'm puzzled as apparently some companies have "poor" amino profiles etc. Also when did My Protein decide to charge these insane prices?! I remember 5kg used to be 60ish pounds with codes!

Whats the best bang for buck that tastes good, can mix well and won't bankrupt me?

Thanks in advance!