Dragonfueled,

It all depends on what you want to do. If you love flying your J3 and simply want to get a boost in its performance, but don't want to get into flying with ailerons, then get the brushless J3. Keep in mind that it will need the same tailwheel / front wheel mods that the original needed to keep it from doing ground-loops. The Trojan will probably be harder to fly than a high wing 4-channel trainer like the Minimag or the E-Starter, but should be easier to fly than the warbirds like the Mustang, FW or Spitfire. Only you know how quickly you adjust and react to different situations. If you want an easy step up, go with the Minimag or E-Starter first, and then the Trojan. If you feel confident to take a fairly large step, go straight for the Trojan.