The only cure for a heavy right foot is a wedge under the accelerator pedal! Your rear tyres will last longer after fitment.
None of the major branded tyres recommended for the XK range is sold as a particularly low wear option. They are all about grip. However, that is not a bad thing with a minimum of 300bhp to control. If you use the search facility you will see there have been a few previous conversations about members' views on tyre brands. Personally, I lean towards Dunlops largely because, in my experience, they appear to have slightly better traction than others, like Pirellis, when conditions are cool. However given similar prices, any tyre choice is only ever a compromise between noise, grip, handling and wear. No tyre is perfect. It's more a question of the order in which you choose to rank these qualities. Mike.