Lesson 1: It's never finished. Ever.
Possibly some rocker panel stripes to go along with the hood spears. Something subtle. I wouldn't do the storm trooper thing, too ricey for my tastes but it's your car.
I'm also against window banners, stickers in general. But I prefer clean and sleek.
2011 V6 Race Red - Airaid CAI , BBK 73mm Throttle Body, 3.73 FRPP Gears, BBK Longtube Headers , BBK Off Road X-Pipe , Borla ATAKs , SR Performance Strut Tower Brace, MPT 91R Tune, Powerstop Rotors and pads, JLT Oil Seperator, Koni STR.T Struts & Shocks, Eibach Pro Line Springs, BMR Adjustable Panhard Bar, J&M Caster Camber Plates, Mickey Thompson Street Comps on 19" Laguna Seca Hyper Black Wheels, Several other aesthetic mods