I need to buy a TX & RX which one do you suggest from the below for 450 heli. Also if you know any other brand that good for the price of the ones listed below. Kindly suggest

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

according to me rcb7x because interface kind of similar to dx7, the sticks and knobs are pretty good, the annoying things is to pull out the receiver from my heli every time i switch to sim. So need a second receiver for purpose. So far no issue with this transmitter.

yeah but their is a larger user base for fsth9x and turnigy 9x.....

So is fsth9x preferred over rcb7x that I can buy

FS9x is better. But 9x is better than these. You can get support for it easily because its very famous radio out there.
Good luck!

Quote from: avesh on March 15, 2013, 03:23:44 PM
according to me rcb7x because interface kind of similar to dx7, the sticks and knobs are pretty good, the annoying things is to pull out the receiver from my heli every time i switch to sim. So need a second receiver for purpose. So far no issue with this transmitter.

Hey Avesh,

You can extend the USB interface wire length by adding a couple of servo extension wires, this way you will not have to remove the receiver everytime.