Good NYC stores / boutiques that sell good-quality button downs?

Hi all. I want some good breathable long-sleeve button downs. I don't care about price. I'm near the UES and all these cute places in Manhattan. I just am tired of wearing a button down and my shirt immediately weighing 10 pounds : ). Either to wear with a suit (it's pertinent to my career), and / or just to wear on their own (European-style).