Having a hard time on this one. I really dig Payno's style of the characters, really nice animated style. Yet, I think I have to cast my vote for LukeStoneStudios because each character is very unique and reflective of the instrument to a degree. I think the selling point is the "Vocals" for me.
Congrats @lukestonestudios on your first win, the next contest is yours to start. Check out the winners thread to see what others have done if you're looking for ideas. Any problems or want someone else to run the show let me or @bumpyboo know.