Asked my self the same question last spring.
I ended up putting mine on a Blanik 4 meter glider, I love it. Plane is over 30 lbs but flies nice, there is a forum on the Blanik here on RCU.
Other options I considered, e-scorpion, yellow F4, Skymaster electric platforms like the f15, if you had two 44's their A10 would be neat!
of course the Savox L39 and F16 are made for the wren, then there are a few Hawks out there, FlyFly has one I considered, but I would not trust that one without major redesign to strengthen it up.
Good Luck, keep us posted on what you decide.
Richard