Dave. I think tyre choice is very subjective and we will all have differing opinions . Like you mine have a few thousand left in them so I will change after our Scotland trip wear and not age. I like the Pirelli Pzeros gone through many sets over the years in the Aero the tread pattern was good less chipping pick up also had that small raised bit around the rim to offer some protection. Tyre degradation on the plus 6 is very good for such a powerful car however you cant switch the tyres around because their different sizes front and back. Em