A low wing plane is the next step. A SIG 4*, World Models Rambler 30/45, Thunder Tiger II are very good choices. Just remember, these planes are not self correcting as your trainer is. They go where you point them and stay that way until you apply controls for them to do something else. I "used" to have a Rambler 30 with an OS 46 FX on it (long story ending with an "introduction" to a steam roller ). I found the plane VERY easy to fly, quite aerobatic, a floater, but handled wind very well (I did my first knife edges with this plane )