It would depend on your "balsa" plane. For instance I have a Gnat. It is an small old style pattern ship designed for a small glow engine. Converted to electric it is a fast and fun airplane. Very few airplanes will survive a crash. But in many cases a balsa airplane will survive better than a foam one. Hard landings with a properly built balsa airplane will just break a prop or bend the landing gear. A foamie will explode.

Any stick style would be a excellent choice for a second airplane. Including Falcon 56 and other similar style.

I also have a 40 sized Sig Kougar. Actually two. One is electric and the other is glow. My electric with a five cell 3000mah battery installed is a half pound lighter than its glow counterpart with NO FUEL. My glow flies longer but my electric is just as much fun.

What I have found is when you get above 40 sized airplanes it is not really practical to go electric. The weight of the batteries will become more than what is practical. If you fly trike gear airplanes you also have to swing a smaller prop.

Good luck and make sure you use good batteries with a spektrum radio system. I hear they "brown out" easily. Thus causing a crash.