For anyone thinking about upgrading, it looks like Simple Tire has Sailuns on sale today for 10% off. I have no affiliation with Simple Tire or Sailun.
I have been running them for almost 4 years on my 16k fiver and they still look like new. I would highly recommend them and will install them again when the time comes. They only lose 2-3 psi each consistently over the winter seasons as well.