I use Metzler's on mine and i love em but i used to get 8-10,000 k out of a rear when i first got the bike but now i only get about 6,000 but i dont mind i enjoy riding it more aggressively now that I'm comfortable with my beast
Just had a new set of tires put on. Avon Cobras. I've only got about 400 miles on them so far, but they seem to grip better than the Metzelers I had before. As noted above, the front does seem to turn in better. I thought something was 'wrong' at first, but got used to it quickly.
I hope to see good mileage out of these tires. All together they were about $50 more than a set of Metzelers.