What about a CG Eagle II? I put floats on mine over the winter and I never took them off. It flys great off the water and will do just about anything you would expect from a trainer. Stall turns, Loops, rolls, etc... and it only has a lil'old, inexpensive OS 46LA. Mine is a kit version but it is also sold as an ARF. The floats are Super Flying Models 40 size fiberglass floats.