I have to go with J-Min with Cooper coming in a very close second. With beats I completely go on feel and listen for how I would sound on it. With that said all of the beats were hella solid .... The Water Ego beat was too elevator for me... too mello--- Coppers beat rang to me and I liked the way it flowed -- this beat like I said was a very close second for me.... the last beat I didnt like very much-- it was too repetative for my liking and would have annoyed me if I put something down on it after listening to it a couple of times.
My vote -- Jmin