From experience with hand launching... a symetrical wing does just fine If the wing loading is low enough for a high lift airfoil hand launch, its low enough for the symetrical airfoil.

There's also the catapault launchers to consider... they are relatively easy to build and will launch a plane that can't safely be hand launched. the catapault will give the exact same launch every time once you have it set up correctly, no 2 hand launches are the same. It costs about as much to make a catapault as to build a coroplast airplane (see www.spad.org for those... might have the design you'r looking for too...)

Visit www.rccombat.com there is a discussion group there, and several postings have been made related to 1/2 scale FW-190's made with a plastic baseball bat for a fuselage.