I've been wanting to add a sport coat or two to my wardrobe but I'm not sure where to start. Most of my favorite button-down shirts tend to be bold plaid patterns, usually in fairly assertive jewel tone colors. I'd like to be able to pair these with my sport coats. My pants tend to be either dark blue denim, khaki trousers, or black trousers. What types of sport coats would y'all recommend to pair with these other objects?