I got the SS 40 in a combo that came with the OS 40 LA. There's nothing wrong with going with the FX 46....a better engine with lots of power for that trainer. But go easy with good instruction at the start. The 40 LA is a good choice for the beginner. Even though it's lower in power, it's very dependable and easy to tune. So...if you know you're going to progress in the hobby and be ready for that 2nd. plane before long, get the 46.