I think you will be quite happy with a 3D type prop on that 46. I went from a 13x6 to a 14x4w on my Saito .72 and gained a ton of thrust. I think I was getting around 6lbs on a fish scale and put it up to just shy of 10 lbs.

The grass is so long at out field I was running a 12x8 3 blade on mine I tried upping the battery a little and going with a 12x8 but the extra weight made for alot more thrust to get her off the ground. This set up was making it torque pretty hard when lifting off. I'm not into flying sideways on take off. LOL