You could try a Das (Ugly) Parkflier Stick which can be found in the plans section of the forum posts.
It flys very well with small motors and can be a rocket with 200+ watts.
Simple box like fuselage, a single piece wing, (no dihedral) and simple stab tail elements.
Add a soda can bottom as a cowl and it also looks nice.
Just my thoughts!
have fun!