Ordered and received the Z6 tires. They look nice, but the road test will be next summer after I wear out the tires I have. At $134 (until end of August, 2018) for the set of two, it’s the best deal I’ve seen for NC tires.
Shipping was incredibly fast. I ordered them from BikeBandit on a Monday morning. UPS delivered them midday Tuesday. I wonder if UPS Supply Chain Solutions actually warehouses these tires in Hodgkins, IL or nearby. I have consistently received tires in one or two days regardless of what vendor I order from.