First off, I would like to point out that 'strictly hip hop vocals' is a statement that really doesn't have anything unique. I find it odd that so many in this genre like to place themselves in a unique category...
I work with a few guys in this genre. It is no different than recording vocals for any other style of music.
#1, Your room is likely going to be the thing that determines how well your vocals come out. If you do not address this, then no mic is going to give you 'great' results, as the issues with the acoustics of your room are going to destroy any attempt at trying.
#2, address #1 and then learn what your monitors are telling you. The mike you have now may be fine for your voice. Maybe not. No way to tell if you are recording with it in an environment that does not give you the ability to make a good judgment.
I hope this makes sense. I am not trying to bring you down. This is just honest truth from my experience.