Just a point of thought... You are spending hundreds, possible thousands of pounds on a heavyweight and now you want to stick the cheapest TX and RX in it that you can... that is just asking for trouble.
Do it properly and get a DX6i with a proper Spektrum receiver like a AR610.
It baffles me that people skimp out on the one thing that A: you can reuse for years and years and more importantly B: Is your only link to that massive investment in the arena.
Going the Orange route with a heavy is like buying a £5000 car and then spending £50 on a cheap plug and Play steering wheel set from Argos.

Going back to normailty, the DX6i's features far outweigh the initial higher cost. They are on ebay right now, brand new for £70: http://www.ebay.co.uk/itm/SPEKTRUM-D...item27ee979437

And here is the receiver: http://www.ebay.co.uk/itm/SPEKTRUM-A...item35dd99bef8

Look after them and they will last years.

Conker 3 is running the same receiver that Conker 1 did 3.5 years ago, a AR6110 Satellite receiver, and the same transmitter.