Spektruim (Great quality; Dx6i, Dx6, or Dx7)
Orange (great quality, cheapest on this list, and receivers work with most Spektruim products)
FrySky (makes a good yet cheap 9X probably the cheapest full range 9 channel Tx)
I have used the HKTR6A v2 (Hobby King's) Transmitter and reciever. I have no complaints with it, it is just not really upgradable. It has a range of alot further than you can see, so if you fly LOS, and are over budget it is fine. Here is a modification I made to it to make it cheaper and more convenient. I put a Xt60 battery connector so I could power it off from a LiPo or LiFe battery. I made a cable to power my FPV and Tx from the same battery. Make sure you don't have batteries in when you have a LiPo connected, I just soldered my leads onto the PCB and left the AA battery holder connected.