Hi krashkart, you should look at the Hitec Optic 6 2.4Ghz radio system and the Airtronics RDS8000 radio system as well as the Futaba 6EX FASST or the Spektrum DX6i. All of the major manufacturers make great 2.4Ghz radio systems, but you might find that Futaba or Spektrum might charge more for extra receivers than Hitec or Airtronics.

The GWS Slow Stick is an excellent choice for a trainer. It's easy to fly, easy to assemble, and easy to repair. It can be flown indoors or outdoors, and can be modified later if you want to enhance your Slow Stick's performance. The stock form of the GWS Slow Stick can't fly in windy conditions much past about 10mph, however.

It would have been fun to see video from your 5th flight! Just remember that every plane has an expiration date, it's just not printed anywhere on the aircraft. Good luck, and feel free to post any additional questions you might have.