Here is an example of a basic suit. It's simple yet classy. Do not forget the tie clip! A floppy tie is enough to bring your whole look down. Also, a fitted shirt is key. You don't want to look like you are swimming in your clothes.
I love the way this man is dressed casually. He is comfortable and casual, yet chic. Being comfortable doesn't mean looking like a slob. Anyone else tired of seeing guys with shorts with the crotch to their knees, a participant T-shirt and flip flops?