Here's one from the old school, Goldberg Tiger2, aerobatic, low cost, will fly well on anthing from an FP40 to a FS60, can be modified for flaperons, easy to build and a ball to fly. Gentle and forgiving with burn holes in the sky performance, lands slow and has gentle stall with easy recovery. H9 Advance 40 is very similar in an ARF format. 4* 40 is a good choice also. A properly dialed in Avistar can be as much fun as a 1/4 scale Extra, and wouldn't take much to modify for flaperons.