If you waved off scale models because a full-size had crashed you wouldn't have anything to fly.
For an aerobatic sport float plane I can HIGHLY recommend a Saratoga 40 on the Hanger 9 .40 size floats. Inverted flat spins look much more interesting with the floats over the airplane. ;-) There is a lot more drag and the pendulum effect is noticable, but this still has a fair roll and I fly it hard. Forget knife edge, though.
Last float fly I noted it was a bit doggy and, when I dropped the nose to land I ran out of up elevator and splunked in very ungracefully. When I got it home I drilled a hole and drained the sealed float - and poured 10 oz (measured) of water out of that side! When I nosed down it had all rushed to the front of the float. The fact I got that much airborne and was able to function - mostly - speaks a lot about the reserve lift and control throw the airframe has. Added a 3/8" drain plug and sealed the hole (it was leaking where the covering was loose over a glue-tab frame hole that hadn't been filled with glue). Flies even better on wheels or skis. If it happens again I'll remove the covering and glass & paint the floats.
Flies very much like the Pulse - another great float plane.