Wow man this is straight dope! I was gonna complain that there wasn't enough low end, then the bass came in! You'd probably have to lower it a little if you had a singer on, but as it is it's fun. I like the mix. Keep it up.
This is definitely more RnG than R&B to my ears and that's not a bad thing at all. Definitely like this. Lots of potential to sing or rap, depending on the mood of the performer with this. Very versatile track.