If you don't mind going the scratch build route, there is great little trainer developed in the 1/2A forum, the [link=http://www.rcuniverse.com/forum/m_2301186/tm.htm]LST 1/2A Trainer[/link]. It looks something like a Sig Kadet, has a 40" span and has been proven to be a good flying plane. For a plane that small, it doesn't take much longer to scratch build than build from a kit, and its a whole lot less expensive. The Tunder Tiger TT .07 should fly it just fine.

Hogflyer

edit: This plane could easily be converted to electric power if desired.