While not 3D, the Tequila Sunrise 25 is supposed to be a fast and fun acrobatic little plane for engines about that size. I'd bet it's good at combat, though I really don't know too much about it. GreatPlanes also has a P-51D Mustang and an F4U Corsair in the .25-class. They're combat specific planes. Again, not 3D but combat.

Great 3D, but not ARF: Mojo 30 would be great. They're supposed to be EXTREMELY easy and fast to build. There are people that build and cover their Mojo 60's in one day, and install their radio the next. That's way faster than I've assembled any ARF besides my Tribute ARF (which took just over 2 days and like an hour the next). Also, the Fat Free Taco by Swany is in the same boat as the Mojo30.

Decent 3D with that engine: Tribute 3D arf. It's a .36 sized plane. Hovering with the evolution 36 a friend has on it is right above half throttle, so I'm sure a .32 wouldn't be TOO much weaker. They're available at Horizon Hobby, and are fairly cheap and EXTREMELY easy to build. I'd bet you could keep it really light if you tried.

That's my .02. I hope I've helped.