I do like the idea of the rug in the room to ground the furnishings. I would go with the last one it has the deepest color tones and works well with the art you can see in the picture. Many of the others tend to fade into the floor and since there is so much movement and color in the flooring they get lost.

Hey there.

I have a blog post that my help you out.

http://timothyriversinteriors.com/2015/04/21/the-secret-to-decorating-your-dining-room-that-wont-cost-a-million-dollar/

Happy Designing!