I would recommend the 4-star over the Something Extra. While the Something Extra is a great building kit, it's not really the best 2nd plane. Now if you're not stuck on Sig products I might recommend the Goldberg Tiger 2, which I personally think is a bit better flying than the 4-star. Now don't get me wrong, they are both great 2nd planes. But I just like the Tiger 2 a bit better.

Ken