I haven't used a .60 two stroke in a Loooong time. For anything that big (or bigger) I go with 4-strokes. However, if I needed to get an inexpensive 60, I would try the Evolution 60. I reviewed the Evo Trainer System (.45) last summer, and if the .60 is as good, it should be great.

PS Great Planes 40 size P-51 would be perfect for your 46. I had one, and I sold it a few years ago just to make some room. Wish I still had it!