Ok....
I'm a futaba flier and I am currently using the new 9C. I love the radio and all the features it provides along with the incredibly simple programing. I will agree, It would be nice to have 10 channels! I certainly could find use for a 10th even an 11th channel but with the type of planes I fly it is not essential. If you are in the market for a new radio and plan on using it for jets, get the 10x. The versatility of having the extra channel will pay off in the long run. Yes, the matchbox will resolve some issues and possibly free up a channel for you but in most cases it wont.

.02 from a Futaba Guy!
Todd