While an 80A ESC is probably not needed, it does afford you an extra margin of safety.

Since the motor can briefly handle relatively higher loading, the higher capacity of the ESC might be a good idea.

Also if you later decide to use the power system on another plane, you'll have less worries.

With a similiar setup I used a 70A ESC with success and both the motor and ESC remained fairly cool in operation.

Try to keep the ESC somewhere where it will get adecuate airflow.