I don't care what it says, it doesn't require a 4-stroke. The reason it says 4-stroke is because they recommend mounting the engine inverted and 2-strokes don't do well inverted. If you don't mind a little work, you can always put the 2-stroke (46AX ideally) in it at 90* muffler out the bottom. For less work, you can mount it upright.

The Reactors apparently fly well, but I don't think they've got the low-enough wing loading to learn to 3D on and it's not REALLY a 40-sized plane. However, if you got a foamy and just flew pattern with the Reactor and then moved to 3D with it you'd also be set.

About the U-Can-Do...stay away. They'll teach you to hover and torque roll, MAYBE inverted harrier...but that's about it. They really don't fly well if you're learning to fly 3d or if you're an advanced 3D pilot. They're funfly, throw-around planes that really don't do anything well. Like I've said before (and I'm sure I'll say again), they have the weaknesses of both profile and full-fuse planes. Chevypower did a great job....I had forgotten about foamies. Foamies will definitely teach you to 3D...having a bigger 3D-capable plane will only reinforce what you're practicing. If you're on a strict budget, get a good foamy ($40-$50) and electronics from HobbyCity. A 16oz foamy will do much better in the wind than an 8oz foamy.