I'm gonna agree with slapping a performance wing on the NexStar, a zero dihedral symetric will get a world of fun out of that trainer fuse. A straight wing like that would be an easy build, and easy saddle modification to really get something going with the trainer.

I can do plenty of stunts, I just do them sloppy, after plenty of gallons of fuel thru a .15... which is why I still use my ElCheapo 40sport plane. It was said the Landing was still fun, read still a challenge to your skill- it is a very definate fixed alt and fixed heading: the precision required to get a sweet landing can also be strived for in flight. Sporty freestyle acro is fun, but scale like precise traffic pattern can be a greater challenge. Mix the two, and try to run with landing precision thru every stunt.