I just posted the following comment an another thread regarding Pirelli's which may also prove helpful here..........While I agree that Pirelli makes a great tire be VERY sure that your tire dealer will warranty them as the sticker on the Pirelli tires that I have seen say that Pirelli will not warranty a tire that has a speed rating lower than that used as original equipment by the car manufacturer. In my case the OEM Toyo tires on my CX-5 GT are V rated, therefore going to a lower H rated Pirelli tire, for example may be an issue if it comes to having a warranty issue. On the other hand I asked my COSTCO tire rep about this and he said that all their warranty's are covered by COSTCO and NOT the manufacturer(Pirelli, Michelin, or Bridgestone), so buying a Pirelli from them would not be an issue.
****I just rechecked yesterday with my COSTCO tire rep and he said that they in fact DON'T recommend or choose to install H rated All Season tires on V rated vehicles but WILL recommend and install H rated Winter tires on V rated vehicles, because all their warranties are offered by COSTCO and not the manufacturer.