I was going to say Savox L-39 but I see you already have one. I never had one but I used to watch a guy at my field fly one with Wren 44 power and it flew quite well. A rugged little ship too. How about a Yellow Aircraft Stingray. They are discontinued but Im sure one can be found. The Jet Hangar A-7 has always interested me. I have not seen one fly but I hear they fly quite well, like all Jet Hangar aircraft do.