I agree, about the 5030 prop.
Just got some, and flew them today for the first time. Excellent balance of speed and power. Felt just right for the stock motor.
I bought them online directly from GWS, where they're a great deal. Only 75 cents each, and shipping is a flat $1.85. I ordered a mixed batch of GWS props in various sizes. Wondered what colors I'd get. Turned out that all were black, except the 5030's were silver-grey (a decent match for the B3D's silver accent color).