If there’s ever a remake of Miami Vice, Concept’s 4400 Sport Yacht is going to be front and center. Renowned offshore racer and boatbuilder John Cosker designed the Concept’s hull — and its racing heritage is apparent from the moment you cast off. Despite the boat’s 44-foot length and 10-foot beam, it handles nimbly in tight quarters with the help of a bow thruster. The hull features twin steps located just aft of amidships, and quad 300 hp Mercury Verado outboards provide a quick jump-start out of the hole. It planes in 8.1 seconds and reaches 30 mph in just under 12 seconds, that on a 17,500-pound boat. Unlike many boats with stepped-hull designs, the 4400 Sport Yacht jumps on plane without squatting and blocking sight lines. Turning out to sea, the 4400 Sport Yacht raced through four-and five-footers at 45 miles per hour. Concept is still tweaking performance characteristics, but our tester (hull No. 1) still topped out at 66.8 miles per hour.