Personaly I wouldnt want to splash that much money on a fork unless it was very well established.
If they have been designed and produced correctly they should be excellent, stiff and strong and they shoult not fatigue. I would be worried that if they did break they would give no little or no warning and go rather spectacularly.
I think its definatly the material to be used but I would like to see it given a good battering before I would invest.