As noted, very few RTF trainers are actually available at this time.
Between the Nexstar and Hobbistar I would choose the Hobbistar. It costs less and in my opinion has a better wing design. It has less dihedral than the Nexstar and has a semi-symmetrical airfoil. After you are flying solo it will be easier to do basic aerobatics compared to a flat bottom wing. Since you will be training with an instructor these 'performance' characteristics should not cause you any issues.
i think they do a training class using the same model, i figure i can practice and fly on my own while training.
Until you can take off and land without the instructor taking control, I do not think fying on your own is a good idea.