I'm just about through my second set of PilotPures on my HP2, so I'm reading this thread with much interest.
My experience with K3's is just like yours Joseph, I never felt confident with them (incl running less and more pressures) and actually pulled them off well before they were done. I then went to BT016s and found no faults with them. The Pures came out and I put them on, it seemed like the bike was more prone to wheelie but other than that, didnt seem much different. I needed a new set for a trip and all i could find was BT016s so they went back on and I still loved them. Then another set of Pures, this is where I am at now. Lately I have been feeling like they lack the confidence in the cooler weather, so the next set will be BT016s again unless someone convinced me otherwise. I'm usually getting 4500-6500 out of both the Pures and BT016s, except one set of 016s when I was spending time chasing Dee Jones and Gary Lackey.