Well, unless your trade-in is REALLY nice, if I had a 2009 I probably wouldn't even bother. For me, I really wanted all-weather packaging with leather seats, a sunroof and adjustable HIDs. I say go for it if you want the creature comforts and plan on staying where it's cold. Otherwise trading up just for the body kit isn't really worth it. I do get 1mpg better than you, though.