Ummm, yea... since when is Sidi the best option for wide feet?
Sidis shoes are known for their narrow feature, its one of the reasons they became popular among professional cyclists. Its seems they have a particular model for wide feet, but Sidis on the whole a reserved for narrow feet.
Shimano, Diadora are good shoes for wide feet, they have also been strong on this point.

There are other new brands that have come up that other people may suggest.