Something that has a sort of military look is the Top Flite Contender.
http://www3.towerhobbies.com/cgi-bin...&I=LXHU90&P=SM
It would make a good second airplane and is a pretty easy build. The tower web site calls it a 60 size airplane but you could probably use the engine and radio gear from your trainer. I've seen the Contender fly with an OS 40 engine.