If you want to learn to blend your striking and grappling, mma would be your best bet. Do you want to learn to grapple in a gi? If so, do bjj, judo, or sombo (although they don't use a gi, the kurtka is like it). Do you want to learn to grapple without the gi? Then look for submission wrestling or no-gi bjj. The MMA classes would probably teach you submission wrestling. Try everything out and stick with what you liked best.