I know nothing about the choosing an electric motor, well, not enough to give a suggestion to anyone. In glow you would want the .35 AX. Float planes require a bit more power to break the water. I have the one small electric plane and to be honest I would look into the electric a bit more, it is just so much easier and cleaner then glow. I really enjoy it but I still like glow and gas in my bigger planes.
Go sign up on the wattflyer forum, it's at the bottom of the header bar, just scroll down and click, it's the last forum here. They speak nothing but electric there.