HAMBURG - Years overdue and tens of millions over budget, a spectacular new concert house is poised to put Germany’s venerable port city of Hamburg on the map as a global attraction. The dazzling building will have its gala opening in January but at a recent public preview, visitors were already electrified by the grand design. “Nothing quite like the Elbphilharmonie has ever been built,” culture critic Peter von Becker said. “This old Hanseatic League city is now home to something that belongs to the culture of the world.”