What key harmonica should I buy next? I have a key of C and a key of G.
IMO It depends on what you want to play. Do you have specific tunes you want to play? If you are looking at playing the blues perhaps an “A” or “Bb” harp.
Keep in mind opinions are like noses, everyone has one! (keeping it clean) I have G,A,Bb,C,D,E, and F. I use the C,G,A,Bb,D the most and in that order. But that’s just me! I am just an intermediate player.
Personally, I would hit an A, D, E, and F, though not neccesarily in that order. But like PB mentioned, all depends what you’re going for!
D and G for sure.