Nothing wrong with the recommended Hacker A50 16S, I just think you should size a motor with some overhead and that one tops out @ 1,250 watts. It will work fine, give great performance as well but in the long term both it and the Axi 4130/16 will burn out sooner (I say this from personal experience with both) if you routinely push them beyond the recommended watts. Why not size with room to spare is all I'm suggesting...

Jack