Personally, I like the "jelly bean", streamline look of the car. It's got curvature and it obviously helps gas mileage out a lot. The only way I'd consider getting the hood scoop is if it added at least 15 ponies from RAM air or whatever.
Needs to be a little more subtle, otherwise you might as well break out the plastic cladding again and start slapping it all over the body, and call the engine a Quad-8. Oh boy, too terrible to imagine.