You Dub that step!
I like it mate it comes on nice and easy and then builds into a bubbly dubstep the voice samples you used are mad aswell! are they from a movie? they sound familiar. If I could offer one little suggestion, I would apply some distortion to make it a little more dirtier, but thats just how I like my dub ;) anyways cant wait till you finish it, it sounds like a very promising track!