i'd say either the camaro, the new fusion hybrid, or the genesis.
apparently the fusion hybrid is pretty darn good, and the genesis is a heck of a car for a hyundai.
but of course i'm going to proclaim that the camaro deserves to win.
300hp V6 with 29mpg? that's car of the year quality right there.
on a side note, i hate the new speed3's. it looks like mazda was sleeping around and got pregnant with subaru. the ginormous intake ruins it for me, and the general styling.