Pretty much any of the middle of the road bindings. Burton Cartel/Malavita, Flux TT, Union Force, etc. IMO, once you get to the Union Factories, that's a little stiff for the Proto for my preferences but that doesn't mean it's wrong. Different strokes for different folks.
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz