I have a Great Planes Super Sportster 40 MKII ARF which you mention in your post. It flys great on a .46 2 stroke, plenty of power, and does good aerobatics. I`ve used both an OS 46LA, and a YS 53FZ 4 stroke, and whilst the YS does a better job, a 46 2 stroke will be fine.

This would be a better FIRST airplane rather than a high wing trainer in my opinion.