I'm wanting a new pair of the Zipp 303's with the new hubs and wider rims...they do them in a 18/24 spoke road version and a 24/24 spoke "cyclocross" version. I'll use them for a few road races but primarily for Cyclocross, in shopping around it appears most of the ones for sale on forums and ebay are the 18/24 spoke road versions...I'm wondering how these would hold up for CX under my 150lb. rider weight and New England CX conditions. Seems like if the road versions will hold up under Thor Hushevald on the cobbles of Paris-Roubaix they otta take CX without any trouble...anyone have any experience with them in this regard?