Fry Top tips

Hi all, I am looking for a fry top to cook burgers mainly. Does anyone know leading vendors?

Do you have any tips on: - Gas vs electric - Dimensions (60 covers in the restaurant) - How does it link to the stove hood - Bench plate or self standing - Smooth or grooved - How to discharge cooking oil - ...

I saw huge variance in price ranges and I am pretty confused on how to select the best one