how much experience do you have?
the clash is definitely a park board. how tall are you and whats your weight? those parameters are going to determine what length of board you should get.
the freestyle bindings i believe are traditional disc bindings, which means they won't be as responsive as re:flex or EST. if your just starting out thought, im sure theyll be fine. after you get more experience on the slopes with this setup youll be able to tell what you want.