This is what I wear everyday: The Tapered Cirrus Short Sleeve. It's been a lifechanger. I still wear the uniform pants, I didn't want to risk the color being off... but the shirts, nobody notices. And half the pilots I see are wearing this shirt as well:

Men's Short Sleeve Pilot Shirt
Fit: Tapered
Fabric: Cirrus
Tall-Regular: Regular
Wing Eyelets: Yes ( Add $2.25 )
Customized Torso?: None