The Great Planes Extra is a very good flying plane. A 60 probably wouldn't take it unlimited vertical; you'd want a 90 for that. If you have a 60 lying around, the 40 size kit is also very good. I'm flying my 40 size Extra with a Supertigre 75 and it has ballistic performance, yet slows down quite well on landings. The bigger they are, the better they fly. The Goldberg Extra is another good flying plane, and again you'd want a 90 2 stroke in it to make it really perform.