If its a trainer you want that you could throw around in the air, you should go for a high wing with semi-symmetrical wing (not the flat bottom type). These have the dihedral to make them stable but can perform all aerobatics sort of KE and hover. I learnt all my aerobatics on that type. Best get a screwon type wing with two screws instead of the rubber band type but if that is not available, rubber band type is also fine. For that reason, the Avistar is quite popular

If its a second airplane you want, Phoenix Dolphin is just great- its 62" span makes it very stable and its built light. Its not 3D though

Ameyam