I don't find synthetics comfortable, and they never look as good. Why do you need stretch in a dress shirt? They aren't meant to fit tightly, and you don't need to be flaunting your physique all the time. The office is especially not the place to be showing off your muscles. However, you would certainly need to spend more than $90 to get a well-fitting cotton shirt. You need a talented bespoke shirtmaker who knows how to not only fit a shirt that follows the shape of your body but also fit a shirt that allows a comfortable range of movement.