Seeking fiber/facility location consultant

This is kind of a once-in-a-lifetime, I have been approved to spend significant time and expense picking the right carriers and U.S. data centers for a large application network up-front. I am looking for resources (preferrably a consultant/consulting group) to help in picking the 'best' complementary carriers and data centers. The ideal resource(s) would help by providing information on where carriers' terrestial links and fiber are run, where their facilities are in the cities we are targeting, and other pertinent physical issues. Any pointers appreciated. Pete Kruckenberg Apologies if this is a re-hash, the searchable archives on CCTec.com have been broken for at least a few weeks.