The charger is in the car - You're asking about the EVSE
I have no idea, but I'm guessing the BEST all weather unit would likely be north of $1000, while a perfectly suitable substitute could be had for half that. Whatever you pay, they should all be 100% reliable . . . . all they are is a computer controlled relay, plain and simple
Unless you have a current adjustable unit, a readout of the amps being drawn is of little use. If the EVSE is not adjustable and is capable of 15 amps or more, a power readout would always say 3300 watts, or whatever the exact number the car charger can draw. If the breaker can't handle that, it will trip. If the EVSE (and the breaker) can handle 20 or 30 amps, it will still only read 13.5 to 14 amps because that's all the car can draw
I wouldn't pay a bunch extra to get a meter for that reason . . . . it's going to say the same thing day after day, so whatever it reads is of little consequence
Don