I went from a DX2 to a M11 and could tell i was driving much better i think it is just how the radio fells in your hands i went with a M11 i just liked how my friends M11 felt so i got one and love it.the best thing to do i next time you are at the track just ask a couple of guy if you hold there radios and see how that fell in your hands and get the one that fits your hands the best and it will make you a better driver.