Stores like Costco often get in luxurious wool rugs, as well as some of the more novelty type. Quality rugs are easy to maintain. We bought an off while Berber rug over 10 years ago at a discount store. We have yet to see any dirt on it. We also have a wool one, and the same is true.
Braided rugs add wonderful country charm.
However, generally they are not of the same quality and they do become dirty and require more care. As far as decorating, if you need texture in your room, think about a Berber carpet. If your room seems very square and angular, consider an oval rug to soften it. Add interest to your room by choosing from the many designs and styles, such as contemporary, Oriental, Indian, Floral, Geometric, etc. Using area rugs with color and texture lessen the need for other accessories in a room.