16x6 is too much, usually used for a 120 2C or the YS110, a 14x4 is good for a 72/82 4C, 14x6 for a 82 4C or 61 2C. A 15x6 is nice to start with for sport flying. If you are looking at 3Ding then try a 15x4W or even a 16x4W.