Which protein shake should i use for muscle building?

What you have now should be fine. Once you use all of what you already have, I would suggest Syntha-6, which is BSN's protein powder. That is what I use now, and it comes in multiple great tasting flavors, and mixes very, very well with no clumps. It's all about personal preference though, find one that you like and stick to it, they're all mostly the same anyways.