+1 on the Nashbar cyclocross fork. I have about 3000 touring miles on mine and it still looks brand new. It may psycholgical, but I think it provides a smoother ride than steel.

As for durability, the around-the-world touring record was set on carbon frame, fork and wheels. I have no qualms about touring with carbon.

I'm hoping to ride to Argentina in 2016 and will replace almost all the parts before I leave, but will probably keep the old Nashbar fork on the bike.