I've been blending, "hip hop, rock and dance," for years.
1. You have to be weary of synthesizer presets. ( most are geared to trance, rave, and dubstep. )
2. You have to be weary of drums that are synthesizers. You really need, "a sampler." ( I believe battery was mentioned )
3. Sonar is the perfect environment for vocals. ( That's obvious )
4. A hip hop beat is nothing more than a downtempo rock beat. ( This should help significantly. )
5. The bass is the hardest part. Getting excellent, and fat, and not muddy bass!! You be surprised how difficult this is. ( Trance, rave, dubstep, ) all the other bass is easy!! But in hip hop, the bass sits below the kick drum.. its very, very hard to do. Especially, when a lot of the synth presets, "suck." You really have to get in there, "an design your own bass."
Aside from the five things I mentioned, I'd also like to make aware, "sampling beats, and breaks." However, do to the amount of typing involved, I will have education partner Google, explain that...