Looking for a new Muscle builder

Just a quick Question.  Any Feedback is apprectiated.  Ive been working out about 4-5 times a week for a few years and been using Muscle/Monster Milk religously.  I'm 5'9  155lb. I feel like I've maxed out with this stuff (and Yes I change up my workout Every few months).  Any suggestions for a good Muscle builder that anyones has had success with?  (Besides Roids)  LOL!  Thanks

Supplement powders in a bucket =

They're good if you're delayed for an hour getting to solid food.