I have a Sig Kadet LT-40 with a Supertigre 45 on it. It has ailerons which will enable you to move on to more sporty planes later on. It is also slightly smaller than the senior, which with the same size engine you may get "bored" with. I am very happy with the plane. It was very easy and fun to build ( mine was a kit ), it makes it easy to learn to fly (with your instructor of course ) and once you learn the basics you can turn up the throws a bit and it will do most aerobatic maneuvers you can throw at it. Well, some maneuvers are a bit lazy, due to the flat wing, but hey, its a trainer, can't expect too much

Have fun!