The KTM is "twichy" in the rough stuff because of the geometry, rather that the forks. This is a charachterisc common to many KTM to provide nimble handling in the tight stuff. Most KTM guys run a steering damper to get the best of both worlds.
I am planning a swap using 50mm WP extreme convensional (rather than inverted) forks. For my purposes the Dakar is a adventure bike that sometime goes dualsporting, rather than a dual sport that tries to go dirt biking. Conventionals seem to have better fork seal life, and the WP's are fully adjustable. I will use the stock BMW wheel and brake, I feel the dirt bike brakes with their thin thin rotors just won't handle 800+ lbs (trip loaded with me) just aren't going to last.