Honda Debuts Sleek and Sophisticated Concepts for All-New 2012 Civic Si Coupe and Civic Sedan Models The Honda Civic Si Concept coupe and Civic Concept sedan are making world debuts at the North American International Auto Show today, providing the first official glimpse at the styling direction of the all-new, ninth-generation 2012 model set to go on sale this spring, the company announced. "The Civic is known for providing a balance of…