Now this is one question I CAN ansswer!

I have 2 of the Edges, one has a Saito .72 with an APC 14 x 4W and it's a rocket, great fun and will do it all.

The other one has a .46FX on it and I tried just about every prop you can imagine on it. hands down my favorite is the APC 11 x 4 when running 15% fuel. I know some guys are running the 12.75 x 3.75 but I didn't like the slow spool up I had with it, even 30% nitro didn't seem to help in my case. With the 11 x 4 my edge flys fast enough to almost flutter the surfaces but can slow to a crawl and when you need the thrust the prop spools up so quick it's no trouble lock the plane into a hover, pullout isn't ballistic but it is there, after all this is a .46.