I really like the beginning and the drop. However, I think you should explore with more plug-ins when the dubstep really kicks in. This is just to reinforce the texture as it sounds rather thin. Also, adding a cool melody will really lift this piece up, even if it's just piano chords :P. I know I sound rather critical, but I think you have potential for creating awesome music :D. Maybe listen to "Fracture" by nk and see the different layers he has.