I am thinking of having my plumber change my thermostat from a unsubtle mechanical model to a Electronic one

I am very confused though.

Its a house so old it pre-dates cavity walls so have big bills and hot and cold spots.

so as In understand it, the key points are

* Nest learns but doesn't have an obvious option for radiator valves
* Hive has native radiator valves but doesn't learn
* Honeywell has native radiator valves but doesn't learn, charges extra for controlling water but can run standalone if we lose internet or the servers are no longer around

I am very confused, what is the latest thought on which is the one to go for?