I used to get 7k - 9k on the front metz. I have about 12k on the avon and still going, and I think that it handles better.
On the rear I have had:
metz - 5.5k,
Goodyear F1 - 20K with a bit left but changes it before my trip across the country last year, good tyre
Yokohama - 20k - okay but not great
Toyo Proxes 225/55 - best yet
I will be sticking with avon and toyo.