I'll admit it, I'm a Futaba fanboy. I've ran several brands in the past ranging from AM, FM, and 2.4Ghz and without a doubt my favorite is certainly Futaba radio systems. In my experience, you're better off spending a little extra cash for a really nice system that will suit your needs for a long time then trying to worry about saving a buck and replacing it all the time.
The quality of the radios, feel, range, and support are top of the line in my opinion. I have a
Futaba 4PL and don't see myself getting another radio for a very long time. If you don't need 4 channels then the 3 channel
Futaba 3PL makes a nice radio as well.
Spektrum makes nice radios as well, however I ran into some interference issues when running my large scale RC's which went away after moving to Futaba. If you don't have any plans getting into 1/5th scale, then Spektrum is another brand to check out.
As for Fly Sky, I have seen others say they use them and like them but for me I just can't get myself to trust an "inexpensive" radio system on my RC's as I have to much money in them to chance.