K60? On twisty roads? We can live with them....or we detest them. Take your pick. But most all of us think they last a long time and the rear gives better than decent dirt grip. Search around. You'll find a couple threads here on gspot. Short version.....it's all a compromise and dependent on how you use a tire.
K76 rear had no real advantage anywhere over Anakee2's or Tourances.