I have the GP 300S Gene Soucy 74" wingspan with an OS 1.60 and it's a nice plane with lots of power - but not for unlimited 3D. Big thread on it over in the ARF section. Most people wound up with a plane that weighs 13 to 13.5 pounds.

Even with a saito 1.80 I can't see it being "unlimited" 3-D but everyone has a different definition of what that is.