Why not try a Shark SPAD coroplast plane? http://www.engine-display.com/, he sells these in kit, arf, and rtf versions from $29.
I fly two of his Shark designs and love it with a .25 engine. At our Sebastian club, he's sold over ten of these to local guys and they race with them. These are durable, cheap, and very easy to fly at any speed, unlike many other SPAD designs out there.