Very powerful beat, love the atmosphere it gives off around the beginning. Hihat is a bit tinny (too much treble gain maybe?) IMO. Also, I personally think this song would sound even more amazing if you brought it out of the slower 2 beat feel after the intro (I know, no longer dubstep then) and turned it into a 16 beat at the same tempo. See this youtube song for the kind of feel that I mean: http://youtube.com/watch?v=TPysmMPTl5 E
Maybe a possibility for a similar-sounding project? Anyways. This sounds really great as is, keep up the good work!