Welcome to RCU,

Of the three Multiplex models you mention, I believe the Gemini would be a good choice for you. The Acromaster is a wonderful, aerobatic model, but it is larger and heavier, and would require a more powerful motor and a ESC capable of 45 - 55 amps. I believe you would be rather bored with the Mini-mag, as it does not come equipped with ailerons, (they can be added through modification), and it is a smaller size. The Gemini can use your available bits and pieces and should be very agile with the proper motor. Multiplex manufactures very durable airplane models using Elapor foam which assembles with standard CA glues. You can't go wrong with any of them.

Jesse