Mostly Town for 37,000 Easy Going miles

Easy driving on overall nice roads and it's now time to replace all four tires after 59,500 km. I've read a lot of reviews about rough driving on Run Flats but I bought mine from a friend and could not tell the difference since. I'm still contemplating whether to go Run Flats or normal. But I will not be buying these Dunlops again because of a few times I've slipped on conditions It should not have slipped. I would say grip is the weakest point of these tires based on my experience.
Tyre size reviewed: 225-45-17-W