I think, for the money, the best purchase is an RC flight simulator.

If you buy a plane with an engine, I would say to stay away from the ones you can't adjust. (You want to learn how to adjust your needle valves, right?)

For extended use, I would stay away from the one with the wing brakes and dams. All the others will fly fine, expecially if you have an instructor with buddy box & cord.

Otherwise, no preference. Good luck,
Dave Olson