As the previous participants have suggested, I put a Surly Instigator Fork on my Kona Hoss (along with several other modifications / upgrades) and it's great. Below are several photos. The bike's much more responsive and handles better now than with the stock Marzocchi Dirt Jumper 2 (on the 2008 Kona Hoss).

The only issue I had was when I tried using my Hadley front hub with thru-axle (9mm diameter I believe) and it didn't quite seat properly. A bike buddy used a machine too to extend the threads and now it fits fine.