All three of the trainers you mentioned will be just fine as long as you have an instructor. GET AN INSTRUCTOR BEFORE YOU BUY ANYTHING. Your instructor will help you pick a radio, one that is compatible with his/hers for buddy-boxing. OR ... you can do what I did and buy your own buddy-box, (they're cheap).

An instructor will also help you in determining what ground-equipment you need. For instance, my field has lots of tables and plane restraints...no need to buy a bunch of stuff like that. All you really need is a glow driver, some fuel, a fuel pump and a chicken-stick. The rest, and I have bought it all, is mostly for convenience. (extra batteries, charger, field-box, tools, electric starter, power panel, 12 V battery, cappuccino machine etc...you get the idea.

I really like SIG and Hangar-9 they just make good stuff. (The PTS is a H-9, I believe).

I love saying this part:

Welcome to the end of 'free time' and 'disposable income' as you now know them.

Have fun!!

(WOW those guys posted fast)...listen to them...