Mr67Stang and MinnFlyer have started you off with a couple of terrific suggestions.
Other good fits for what you might be looking for include:
-Model Tech Fledgling II ARF with brushless outrunner and ESC
http://www.hobbypeople.net/gallery/123506.asp
-Parkzone brushless J3 Cub or brushless Decathlon
http://www.parkzone.com/Search/Defau...chTerm=PKZ_CUB
http://www.parkzone.com/Search/Defau...=pkz_decathlon
These are all high quality electric airplanes that you can use with your existing helicopter transmitters if you so desire. There is an even larger number of good RTF electric parkflyers available that come with a transmitter and receiver if you'd rather get a complete package.