The .76 will be too heavy. It will be nose heavy and you will have to add even more weight to get it to balance properly. This will made the plane snappy and you will have to land faster.

OS 46FX 16.45oz w/Muff.
GMS 76 21.9oz w/Muff.

The GP Extra 300 .40 was designed to be a scale/sport/aerobat. The kit was designed a few years ago when no one had heard of 3D and very few attempted to hover.

If you want more power you can get a OS 50SX (better) or a Saito .72 (best choice) as both are less than 17oz ready to fly.