Nowadays, when it comes to gas grills, we can choose from a variety of options. Most of them are really powerful, but the price may bite. You may want to pay attention to your grill’s lid and check if it snugly covers the body. If that’s ok, gas grills (that heat cooking chamber by convection) with 75-100 BTUs per square inch will be fast to heat up and maintain cooking temperature. There are also options with 50-80 BTUs for infrared grills (that converts its burners’ heat to radiant energy by restricting the airflow) which are good as well. But you have to check the lid on them too. It must fit the body tight.