solid
Like what you've made here, reminds me alot of datsik/ excision type of ds, I would advice doing something with the intro because it sounds quite muffled to me. besides that, you got a good enough drop, and just the right amount of variation that it doesnt become boring.
if you want any feedback from a dubstep fan's perspective just ask in the dubstep crew thread we got going, same goes for anyone reading this who produces dubstep http://www.newgrounds.com/bbs/topic/9 90595/
keep it up brudda!