Nice one
I don't know if it's just me but i'm going to give my honest opinion.
I really, really loved your vocals you should start considering doing more, at least in my head they just sound amazing, altho other people might disagree. Probably I'm just a vocal freak, almost every vocal sounds nice in my head.
The other one is, like I said in some other SM&NS remix, is that this melody is awsome and it goes better with techno/house/trance than with dubstep (again it's my personal preference). Good job on doing it right :)
Lastly but not least, those vocals were beast !
Keep it going ^^