Personally, I'm a JR fan. I've been flying almost everything RC for almost 18 years, and JR is top quality.

You have to ask yourself if you will upgrade (or want the option to upgrade) to collective pitch in the future. The Corona works with any 4 channel airplane radio.

If you want a basic radio the JR quattro is the best. It is 4 channels and cheap ($150)but will not do CP (collective pitch) helis. The Jr 662 ($250) will do CP and will work well for the corona (use it in airplane mode). The Hitec line is slightly cheaper and lots of people have much success with them, however my personal opinon is I don't like them. Again this is just me.

The Hitec laser 4 (glider version) with 2 hs-81 servos and 555 rx ($135) is the basic 4 channel non CP radio. Stay away from the feather rx, the 555 is much better. If you want airplane and heli mode (CP) the Hitec Eclipse 7/fm ($267) is the one.

Keep in mind that with either of the CP radios you will need to purchase 3 servos like I metioned before. The Quattro will need additional servos and the laser will need 1 additional servo.

I should have mentioned that while the standard hs-81 will work, the cheap plastic gears will strip rather easily. So either buy the metal gear ones as they are not included in the radio packages (which most guys do) or I think that you can buy metal replacement gear sets.

Good luck! I truly believe you are making the best desion. The gear that you buy for the corona can be used in other helis. I just bought a Kyosho EP concept (CP heli) and everything I used in the corona is going into it. You cant do this with the micros. As for the servos you don't use you can use them in other electrics or bigger more capable helis later on.