I totally and absolutely agree w/ Ross, ballgunner, and FHH that Sig's LT-40 in either the kit version or the ARF is an excellent choice that you'll not regret making.

I fly a LT-40 ARF powered by an O.S. 52 four stroke and feel its the best 4 channel trainer kit produced. Sig's 3-channel Kadat Senior (using the same 4 stroke engine) and a Futaba radio system is really the ultimate RC model that I've ever flown. The Kadat Sr. is a great slow-flyer and its large size makes it easy to see. Unfortunately, like any model w/ very low wing-loading its not the best plane to fly in high winds. The LT-40 handles wind a little better. Of course neither Kadat model is what you'd call aerobatic - but then this is not a quality you'd expect (or particularly want) in a trainer.

Mark in Missouri