you mentioned strada, so i will mention z6.... metzeler has their new version coming out also, so maybe can find them on the cheap(the old ones). I know I will be keeping an eye out. I have 1700 miles on mine, and about 1500 of that is highway commuting. barely even looking flat spot in the back, front perfectly round. I have a friend runs the strada on the bandit 1200 and gets 7k, he said he is near 6k on the z6's probably get 8 or 9k. but his is all curves, no interstate.
i never had a traction problem with the z6's, even have some laps on the dragon on these sets.