Matthias, I just bought a set of Goodyear Marathons, I asked my tire guy about the G614's and he said they are great tires, he said they are made like semi truck tires and good if you are traveling 40,000 to 50,000 miles a year, they are a 14 ply tire but like you say a little expensive. He gave me an alternative of the Marathons, they are a 10 ply tire and will do what I need them to do. They are about half the cost of the G614's, but I would say it's a matter of choice.