Which is the best home buying site on the Internet? According to the latest independent research survey performed by Gomez.com, 15 top real estate sites were ranked for excellence, but not always in the order consumers or the industry might guess. The best overall score went to Realtor.com, but only by a nose. Following close behind, by less than 1/10th of a point is HomeAdvisor. And third place went to not another listings giant, but to Cendant franchiser - Coldwell Banker.