As an instructor my personal recommendations would be either the Super Star or the Alpha.
IMO the Nexstar is too expensive for what you get although it does fly OK. It has features (gimmicks) that you don't need and in fact should not have on it.
I also feel the PTS P-51 is a better second plane than first.

Any way you choose, please utlize an instructor to make the choice last more than a few seconds (on average). You'll hear this repeated a lot. Also check with your local club as the instructors there may have an opinion that will influence your choice as well.

Welcome to the hobby and good luck.