I would go brushless with the LiPo's, lighter and more powerful. You should have no problems using those with either plane I would imagine. Just make sure you get an adequate ESC. You might even consider a glider. Otherwise, I would probably say go with the Slow Stick.
http://www.horizonhobby.com/Products...ProdID=EFL1075
http://www.hobby-lobby.com/easystar.htm
Or possibly something like an Aerobird Extreme
http://www.redrockethobbies.com/Hobb..._p/hbz7200.htm