off to a good start
this sounds like dubstep, not r&b :)
well first off it's really too bad you used Brutal Electro patch from massive, it's way overplayed atm..
Well you need to tighten up your drums abit, have your bass stick out way in front there. Vocals need to be turned down abit.
I like what you did with the vocals and the strings, sounds really good imo!
Check out my latest dubstep track Invasion , tell me what you think !