The first poster provided links to great threads on this topic. It is an important decision when you are looking at a Class A. It is a personal decision based on many factors. Given X dollars, you can buy a newer gas coach or an older diesel coach. How handy are you? Can you financially handle unexpected expenses? For a shorter coach, you can get a gas coach that would work just fine. Our coach is 39 feet long and we love the diesel handling and ride. But we cannot compare a gas vs diesel because we have only had the diesel.