Been There done that. Diesel is just a much better experience.
You can take the advice of those who have done it or you can buy the wrong truck and upgrade later. It always cost more to get it right the 2nd time around.
You can fly to your destination, or you can take the train.
The train will always be much cheaper. After enough flights you forget about the train....The train is still much cheaper.
Much like the train the only advantage the gasser has over the diesel is the price. All other factors favor the diesel.