Basically just for circuit racing you even could use a 3PV but with the use of the T-FHSS receivers to get de max speed possible for normal servo's, it has all the basic settings you need.
The 10PX has tons of settings and support the latest F-4G protocol which I think it will be around for at least the next decade as also the decade old T-FHSS is still supported and the max standard for the lower priced transmitters..