Need to replace the rear tire due to a hole near the side wall of my MPP. I know many here prefer the Michellins but wondering if anyone considered the PIRELLI SCORPION ZERO? Discount tire currently has a sale and almost $500 difference for a set of 4 between the Michellins and the Pirellis. Considering going up in size as others did with Michellin (265/40R21 in front and 295/40R21 in the back). Any thoughts?