I have 29,000 miles on my FZ8. I have brought it new and went through a handful of tires. I have rode with Metzeler M3 and M5 front and rear sets. Bridgestone BT-023, BT-021, S20, and stock BT-016. My favorite by far are the M5. I got about 4500 miles out of my M5. Rear got to bad. I like having same tires front and rear. But in regards to lasting the longest I would have to say the stock Bridgestone BT-016. I have gotten over 9500 Miles out of the rear before the chicken strip got to bad and annoying on turns.
hope this helps