The MT-4 is definately a "Pro" radio. It alows the super high response just like the M11x. Its also way more comfortable due to how light it is. You just missing out on the crazy throtle curves and stuff that you don't even really need on the M11X... As far as the Futaba and Radiopost go I couldn't tell you because I havent owned one. But I know the MT-4/M11X response is faster.

I never found a reason not to have a MT-4. The only thing that would make me happyer with it would be a backlight. But some aftermarket compannys are making them now.