My mate and I ordered 2 of the Hobby King 6 channel 2.4 Ghz radios from Hobby City, together with the PC cords and 2 extra receivers each. I downloaded the required drivers and set up software, but found that, apart from increasing the servo travel, I did not need to make any other adjustments. A radio with 3 receivers and the PC cord for under $100 Australian is an absolute bargain, and this price includes postage costs. I also ordered another receiver for a club member who has a Turborix 6 channel radio, as the receivers are interchangeable between Turborix, Hobby King and FlySky (who actually make the radios, I believe).
I have used mine and it performed flawlessly, it feels good, the sticks are well balanced, and the range is excellent. I have added a connection to mine to enable me to use a rechargeable battery pack instead of dry cells. I found a tutorial on how to do it here
http://kenbuys.com/turnigy-transmitter-batteries-1450mah/Based on my experience, I would recommend these units to anyone looking for a cheap, well made radio.
Plenty of info on the radios, and other Hobby King products here
http://www.hobbyking.com/hobbyking/forum/default.aspPeter.