I have the Williams 30X and at 10k I had to rebuild the hubs. The hubs were shot.

I bought a set of Fulcrum Racing 3s and so far I like them better. I only have 500 miles on them though, but I had Fulcrum 5s before and they had about 5k on them before I sold them with another bike I had. I bought the Fulcrums from the site that stapfam posted and had them in a week. I live just west of Houston.