I've really liked my Schwalbe Marathon slicks. But they don't make them anymore. I've got over 3200 miles on one and have had only one flat. Another one has about 2800 miles. My other has only about 400 miles so it should last a while. The higher mileage two are starting to wear. These are 406s. I mainly ride on paved trails and roads with some limestone trail thrown in sometimes. Any recommendations?