Men’s Health did a great piece on the perfect white shirt, and it think it summarizes the importance the white dress shirt perfectly.
A man’s clothing essentials are few in number and clean in style: blue jeans, cashmere sweaters, chinos, a few dark suits, a blazer. Nail these and everything else falls into place—especially when paired with the most essential of essentials, the perfect white shirt. The right white shirt works in situations from business casual to black tie—and a discerning man knows that some are closer to perfection than others. A crisp white shirt with the right details reveals you as both a professional and a purist who stands apart from the guys in basic (boring) blue.
Read more at Men’s Health: http://www.menshealth.com/style/white-shirt-style#ixzz2JQj3FFyJ