I typically get 12k from a rear Heidenau K60 Scout for reference. I have an Anakee 3 on the rear now with over 12k and lots of tread left. I'm impressed with it's wear characteristics and longevity as well as how long it resisted squaring off, (better than the K60). That said, I will NEVER buy another Anakee 3 front tire. They wear in a horrible, tri-banded, nastiness that makes the steering unpleasant. Reminds me of an old original Pilot Road front, which wore about the same way.
If I were buying a new set of tires today, I'd probably either try the PR4Trail front with a PR4 standard rear, (the Trail has a softer compound and you can't get our front size in the standard type), or go with a Anakee 3 rear and a ContiTrail 2 on the front. I haven't run the PR4s yet, so don't know how they will wear for my riding style, which has been mostly street and gravel roads for the last couple of sets of tires. I don't commute, just go places with the bike. Often places far away. ;D