LL Bean chamois shirt sizing advice

Any advice on sizing regarding LL Bean chamois shirts? I've read that they run large. Also, I'm not sure which colour would be more versatile / interesting. I already enough navy shirts, so I'm hesitating between the barley one, the green one and the burgundy one. My heart tells me to go for the barley one, but my head warns me it might not be the most versatile choice.