RE: A radio to grow with
I'll stick with the Futaba 9C. I know it costs a little more, but it does have the following the others don't:
Interchangable frequency modules
Usable on any frequency band
72 MHz synth module and receiver are available
2.4GHz FASST module and receiver are available when you decide to upgrade
More mixing and control options than the 6EX or 7C
Changable CAMPAC modules to increase model memory to any amount you need
What more do you need?