This is a good question and one which concerned me when I started riding cross. I can only vouch for the integrity of the Kinesis EVO forks after I stacked avoiding a rider falling in front of me at probably 15mph with the front end taking the impact of the crash. The upshot was that my frame failed catastrophically at the thinnest **** on the d/t and no structural damage to my fork (which was sent back under warranty and tested for integrity. I have the certification). A quick straw poll of my 'cross buddies gave the following recommendations: Kinesis EVO's, Ridley Pythons. Lots of recommendations on the steel front for IF too.