proper headeset for a Cannondale Capo 2008
 

I finally got that Capo 2008. It is no secret that all the parts except the frame itself are a total waste, even the headset. And right there is the problem for me: which one fits? I heard that the campa hiddensets (both record and chorus series) would fit and also the FSA Orbit Z 1.5 R Headset (my favourite so far, looks really though). can anyone confirm that before I order one? I am hesitating because I can't find any specs at the Campa Hiddensets that they would fit in a oversized tube of 1.5" like the one of Capo. Or do you have even better suggestions? thanks...