I am running the Dunlop 402 and notice a significant track of the road grooves. The tire is worn about half way.
About 3 months ago I noticed a wobble in the front end and it just felt a little loose. I checked the front bearing and needed to have them replaced, about 40K on that set.
I have never experienced the tank slap, but have had the rear wobble occur in turns. I find my shocks are usually low below 20psi when it occurs.