You Can DO 3D preformance?
Here's what I have done with a Saito 91, purchased used:
Hovering, Torque Roll
Blenders
Snaps, Spins
Flat Spins (almost flat), Knife Edge Spins
Pinwheels
Elevators, Harriers (working on keeping the wing rocking down)
Walls (good), Parachutes (incredible)
The plane is a joy to fly and everyone at the club loves it. I have 3001 BB servos on everything but the rudder, which has a 90oz JR4735 servo.
The OS 91 has good power, so if you can get it tuned properly you should have a lot of fun with it.