The OS 70 Surpass is 3 oz. heavier, and quite a bit larger than the 46 FX you were previous considering. However, it also has more torque for larger prop. Of course, you knew all these already. For the 70 Surpass, I would still stick with a plane under 5 lb for 3D-capable power. If you want value, I'd still point you to the $125 3D Giles if you want scale looks. For fun fly, the Goldberg Extreme profile is your best bet. Profiles are a lot more efficient because they are lighter for a given size, and the thin fuselage yields the least thrust loss due to fuselage width.