I had 8600 on the ME880 rear. I probably could have squeezed a few more out of it but I figured it wasn't worth the risk. Previous to this bike, I can't recall getting more than 5000 on any rear tire - So, I was pleased.

I'm still running the ME33 on the front. Its got 9200 + and it seems to have quite a bit of life left.

I did shop around for a front while shopping for a rear. What I've found is;
1. The ME33 is discontinued.
2. Replacing w/ a ME880 required going from 80 profile to 90. There's a big difference in the circ. Don't do it unless you're absolutely sure it clears the fender.
3. My tire dealer said that he can replace with the new ME33 TECH. (Its similar, but not exactly the same). They're hard to get and he would need several days advance notice to get one in.
4. His second recommendation is the Dunlop.