In recent years, there's been a veritable BTU arms race as companies market BTUs to the mostly male consumers who buy grills. Basically, if you have about 40,000 BTUs, you'll be fine. Very few grills need more than 40,000 BTUs. The exception is huge grill surfaces, often found in outdoor kitchens. Examine what they're made of.
Stainless steel is the sturdiest and easiest to clean.
It also is the most expensive. Porcelain-coated cast iron is also very good because it's strong and the coating keeps the iron from rusting. If weight is a problem, other materials coated with porcelain may be a better choice. Chrome is the least durable and will rust, Myers said. There's nothing you can do to keep them from wearing out.