after reading DX3R instruction manual, it seems to have all the feature that anything will need for RC car (unless you want "drive itself") except back lite.

there is an review on Xtreme RC of DX3R not 3.0. it look impressive, I am thinking of getting that if my current controller (Nomadio React) fails although it is least likely. 4PK is nice but not sure if my pocket is deep enough for it and Horizon has better customer service from my past experience with other Spektrum product.