Much of your choices depend on the diameter of your boil kettle AND, more importantly, the power source that’s available. I use a commercial grade Waring 1800watt induction burner for my HLC and I absolutely love it. However, my HLC is only an 8 gallon kettle that’s about 14” in diameter. So, the heat plate/coil almost fully consumes the entire bottom of the kettle. Also, this unit runs on 120v.
Perhaps you could offer a little more information on your requirements?