General Motors has just released pricing for the new 2011 Buick Regal sedan, or if you prefer, the North American market version of the Opel Insignia. Initially, the Regal will be offered in a premium CXL trim with two engine options, a 182HP 2.4-liter Ecotec four-cylinder with direct-injection and a 2.0-liter Ecotec turbocharged and direct injected four-pot rated at an estimated 220HP.Prices