Hot on the heels of the debut of the Esperante Spyder last year, the boutique U.S. automaker Panoz has revealed its wider, more powerful sibling, the Esperante Spyder GT. Weighing in at just 3,300 pounds, thanks largely to its lightweight aluminum body, tubular-steel subframes, and carbon-fiber superstructure, the GT delivers an excellent power-to-weight ratio. The car comes equipped with a standard 560 hp V-8, though it can be upgraded with an optional supercharged engine that produces in excess of 750 hp. Bu…