I second the 9X for an inexpensive radio. Don't pass up on the backlight kit if you get it.
Before I get all nutty talking about the radio, Turnigy lipos are cheap and of good quality. You can get them through hobbyking.com. Now for the radio question.
I am trying out both the 9X and 9XR side by side and prefer the 9XR for ease of programming and build. Its $10 cheaper but you are going to have to drop an extra 30 or so for a module and $6 or more for a receiver. So $60 plus shipping for the 9X, $86+ for the 9XR. You would also have to pick up a lipo for the 9XR but they are comparable to the 8AA needed for the 9X.
The 9X comes with an Rx and is ready to go, so it is simple, but I find the user interface annoying to use and the buttons are iffy. It has an 8 model memory which fills up quickly. It has two position dual rates and the ability to set switches. It is very hard to see the screen indoors. (Why I mentioned the backlight kit) Simply put, it will fly planes right out of the box.
I like the 9XR over the 9X for several not severely important reasons. It is quicker to program and not as counter-intuitive in navigating the screens. It does have 3 position switches, but flying DSFB planes doesn't require all that much precision. It has a 16 model memory and microsd card slot and requires no modification to run off a 3s lipo. It is easier to flash the firmware if so desired and, frankly, though I thought it was an uglier radio in pictures, it looks and feels much better in my hands.
If expense is key, the 9X is a great choice and you likely won't regret it. It functions as well as the 9XR once the plane is in the air, the 9xR just suits me better.