Its not about the features or the screen at all. Most good radios will have all the settings you want--expo, subtrim, trims, EPA, dual rate. Its about the comfort and feel and about how the wheel and trigger feel. I have been through about 4 pro radios in the last year before finally settling on the m11. Its a very subtle thing but with the M11 your hand doesn't move as much, the trigger has a better shape and is a better location than any radio I have ever felt. The steering wheel is more progressive and has much less travel--your hand moves less. But as rb5 said--you will go faster when you find a radio that suits you--and its not because of the big fancy screen or tons of features--its how it feels and how the car reacts to teh controls.