That M1 is a sport tire so the milage is going to be fairly low due to the soft compound.
I just finished up a Metzler MEZ4. Igotta say thumbs down. The edges on both sides looks like I took a file to them. And when you get over on that edge the ZRex just steps out on me. And I have a very smooth and consistant throttle hand. On top of that I only got about 2k miles on it. My last front tire was a BT010 Bridgestone. 3500 miles tops. I went back to the BT020 on the front but it doesn't offer the grip I need. Avons are going on next.