The muscle car era of old is long gone, but in its place are a pack of “modern marvels” that can tear up any track! The Mercedes SLR McLaren, Porsche 911 Turbo S Cabriolet, and the Nissan Z350, are all hot performers in their own right. The first two will cost you a mint, the Nissan is more in reach. Time to compare the models and let your imagination run wild.