Hi Dazzler,

What does your friend want to do? These are 3 distinctly different planes. Any of them can just fly around the circuit, but they tend to be specialized for particular types of flying.

The Easy Sport is a "sport plane". It probably flies the most like the trainer of these 3, but it should be faster and more manuverable. I've flown a few of these, and the .46FX is a fine engine for it.

The Dazzler is a "fun fly", and is good at doing 3D type manuvers, very tight loops, fast rolls, exremely short takeoff an landing rolls. Most people I see with fun flies, keep them very close in and do wild aerobatics low and near the runway. I've flown a few of these, and again, the .46FX would be plenty of engine.

The Tracer is a "pattern plane". It's designed to do competition aerobatics, like stall turns, cuban eights, humpty bumps, etc. I've only flown a Tracer once (did the maiden flight for someone), but I don't remember what engine it had. Lots of the pattern manuvers call for long vertical climbs and descents. Depending on the weight of the plane, a .46FX may not be the best engine. You may want something a little more, or maybe a 4 stroke (to help keep it a bit slower on vertical descents.)

I hope this helps,
-Wade