What thermostats are you all using? Need help deciding please!

[ReptilesK2]

Non-Proportional thermostats turn on and run the heater up to a selected temperature, then it shuts off until the heater cools down to another set temperature.

A Proportional thermostat continually runs, and is constantly making small adjustments to the electrical current so that the temperature stays constant.

I use a Herpstat Pro for my PVC enclosures, and my tubs are being ran with VE-100's.

Thanks, for the explanation.
So should I get a proportional thermostat?