Well it all depends on your skill level. Did you crash your Cub a lot? If you did, get a simple to control plane like a GWS beaver. If you have progressed in skill where you can fly as hard as you want and not crash, then you can get a hardcore plane like an E3D. A good 3rd plane would probably be a nice aerobat like a flat foamie or a zagi. Both are very fun to play with!