I have a M8 and the 3PM FS PRO, and I would like to share my feeling.
M8 have a better and more friendly screen that the 3PM, but the Futaba was cheaper and also has the mostly use function. I like the Futaba feeling and also the underweight, with the M8 the 45m finals were a pain for my left arm
Im using the 3PM FS PRO with digital futaba servos 9451 on my 960 and on my touring G4S im using on the throttle 9650 and steering 9550, and im VERY happy!!!! and for the price!!!!! you are getting a VERY GOOD radio, and with the diference you can get a better engine