I don't see what all this hard man talk is meant to prove. Ring the Police, make a statement and it'll all be over with.
Taking matters into your own hands will ONLY result in more trouble. Either with him causing more hassle with you, or him getting some mates to cause hassle. People actually listen to the Police and they'll know better than to f**k with you after it.
I don't see why any other action needs to be considered? That's ABH, case closed.