Rain performance was my #1 factor in deciding on a tire since I was coming from a Mazda3 with Pilot Super Sports that were wicked in the rain.

I liked the K02 hype, but the wet traction reviews are some of the worst I had seen. So I went with Duratracs which are still no Super Sport but definitely decent predictable wet traction, plus they came highly reamended by my work truck snow plow friends.
They also have preformed very well off road and no issues of blow outs like many have suggested.

I will say this for the K02's being used in CA or places it does not rain a lot. Places that don't get a lot of rain have an issue with oil buildup on roads that make them very slick when it finally does rain.