rc_flyer428,

Like Dr1Driver said, your local club will be the best resource for what you should get. They will also know the frequencies that are available most of the time, and you will be able to find an instructor who has experience with certain trainers, so they can recommend the best one for your training. Not that the feedback here is not beneficial, just that there may be one that will fit better than others at your location due to the instructors experience.

Keep in touch and ask as many questions as you can!