I have the edge with a 3.2 brison on her, I found for all aound flying a Menz 21 x 10 has worked well to include 3d. The RCS 22 x 10 was a very good prop for 3d. I have ran the following:

22 x 10 Menz 6400
21 x 10 Menz 6700
22 x 8 Menz can't remember
21 x 10 Mezlick 7500
22 x 10 RCS 6200-6300
22 x 10 zinger 6100