Bill, the FK makes as great float plane, as does the LT 40...I think with the bigger floats, you would be better off with the bigger plane. The 4*60 will not be as forgiving on floats as you may be used to. The extra weight of the floats is really noticeable (much more so than the FK), so I would suggest starting with the FK, and move to the 4*60 when you are comfortable.