I think you forgot to add what it is you are using this motor on. People are throwing opinions, but what if you want max speed, or you want 3D? a16x10 3 blade works awesome for 3D with that motor in an edge 540 I had, then I had the same motor in a p-51 and it really loved the Mez. 16x11. Unfortunately, if you don't try several, and go by opinion, you may end up with one that is only satisfactory and never know the difference. Just my .$.02 worth.