You can't go wrong with a 4*40 with a few easy mods. This was my second plane as well. A 4*40 with a Saito 56 engine is a perfect match. Shorten the wing by one rib on each side, sheet the turtle deck for a cleaner look trim the canopy a bit because the stock one looks dorky and you have an excellent second plane that is easy to fly and will do all basic aerobatic manuevers.