skyflier, Lots of good suggestions have been offered for a second plane. My suggestion is for you to convert your Tower Trainer 40 (a great trainer BTY) into a taildragger. This will give you taildragger experience on a plane that you are already comfortable with. This will also put some interest back into flying this plane that you already have. Flying a taildragger is only different for landings and takeoffs. Once in the air, it is the same as the tricycle gear you have learned on. Just different techniques needed on the ground. This will make the transition to a Cub or any other taildragger smooth and easy for you. So your "second' plane should be your "first" plane, "phase 2". As far as what to buy next, the Tower Cub is a good flying semi scale J-3 and would be fine after flying your Tower Trainer as a taildragger for a bit. I you want a low wing, the Sig 4-star is hard to beat plus it is also a taildragger. It is available as an ARF or a kit, both 40 and 60 size. The Goldberg Tiger is also a nice low wing but only sold now as a kit, both 40 and 60 size. If you only want an ARF, the Great Planes Easy Sport 40 suggested by ratshooter is low cost and a very capable flyer. Take each step as you advance "one step at a time" and you will do well. Enjoy !