lol! i had the same issue! these were my exact choices!!! if your willing to take the risk, then you can order the turnigy 9x(from HK i assume), or you can buy the fsth9x from RCbazaar.... Please note, the fsth9x and the turnigy 9x are one and the same thing.....
the only advantage the rcb7x has is the rc sim....and that's more of a novelty...
the turnigy 9x has a better firmware, but you cant change the module on it....
the fsth9x has a crappy firmware, but the module is interchangeable...also, you can flash the er9x firmware on both.....
you can get a sim working with both, using a 3.5 mm "AUX" cable.... also called a male to male cable...
i have my transmitter working fine with phoenix RC...
P.S.:- i have a FSth9x from RCB....
hope it helps
Aniket