That would depend on your current level of flying ability. If it's the classic second plane situation where you've just gotten good with your trainer and need something that will let you expand your aerobatics abilities, a Cub would be a poor choice. They are as quirky as a trainer and just as bad in the wind but in different ways. Cubs are a pleasure to fly once you have the skills and get used to them, but IMO they'll hold you back from developing as a pilot. The classic second planes mentioned above will do you a lot more good at this stage.