RE: Avistar or Superstar?
I solo'ed with the NexSTAR. Advantage: RTF (it took me about 4 minutes to put together). Additional advantages, some may call them useless gizmo's, are the wing tip spoilers and air brakes, as well as the AFS (Automatic Flight Stabalizer). I never used the AFS on mine but did use the wing tip spoilers and airbrakes. Seemed to help a lot. But best of all, it came with a CD with the RealFlight Simulator with the NexSTAR. I used it often and it did in fact help with my solo because I was up and flying more quickly than if I did not have the simulator. A good friend of mine, Carl, had t he same rig, he solo'ed on his second flight. He based this on the simulator time he spent.
Good luck. Any of the aircraft you chose will work just fine as long as you buddy up with a good instructor. Make darned sure he has you practice "emergency procedures", Dead Stick for instance. Paid off in spaded for me!!
Dick.