Living largeIn a depressed residential market, Signature Place rises above other condo developments, Fred Gordon learns. In Florida, a state currently undergoing a dismal residential market, where at least 75 percent of condominium towers sit in various stages of construction, some completed but most empty, Signature Place, a $170 million development by Tampa Bay-based Cantor Development in downtown St. Petersburg is in its final phase of construction and about 80 percent sold. Why?