One thing I have not seen mentioned here is how the radio feels. If at all possible I would suggest not buying anything until you have had the opportunity to hold it. I have no bias as to what make you buy, I have used JR, Airtronics and currently Futaba and have no complaints about any of them. All of my mishaps have had to do with the carbon unit not the chip.
The reason I suggest holding it first is because of my experience. A friend had a radio for sale, nice radio, great price. I won't even say what brand because it isn't relevant. It just felt a little off in my hands. I bought it anyway. The longest I could put up with flying with it was about 10 minutes. I sold it to a some else who absolutely loves it and still likes to tell me he stole it from me.
Let me stress again there was nothing wrong with the radio. It just didn't feel right.

What ever you decide on....Enjoy!

Cheers

Gord