If this is your first radio, and you don't have to 'worry' about getting rid of other or older receives, the DX7 is by far the best choice. The servo's from just about anybody will work, and it comes with four quality servo's. Receivers are going to cost you around 70 bucks no matter what you choose if you get the standard receiver (not including smaller electric model type mini or micro receivers with a limited range). The DX7 receiver costs a bit more, but you are getting more.

Read up on the systems, Horizon Hobby has the writeup on the DX7 and there are many posts here on RCU that discuss the DX7. I have one and prefer it to anything else I have. I am, in fact, in the process of replacing all of my RX's with the new DX7 receiver.

And, most hobby shops worth mentioning will sell it for $350.00. That's a reasonable price to pay for such a quality RC system.

Best of luck.

DS.