RE: Spektrum 2.4 module in my 9CAP ?
Like Brian said; do you want to play with any of the BNF models from Eflite or Horizon? Spektrum/JR also have a lot more rx types available than any of the other manufacturer's and the prices are more reasonable than Futaba, but I think a bit more than Hitec.
If you're just getting into the 2.4GHz systems, which one to use out of the three mentioned is the subject of much discussion/controversy. You must stick with which ever brand you buy as they are all proprietary systems and will not work with each other.