Cute layout, and love your couch. I love the modern design that you are drawn to in the rugs. Unfortunately though, black rugs are going to be a nightmare. Every spec of everything will show up like a sore thumb. Every thread and every piece of lint. Also, if there are any windows in the room (I don't see any in the photos, but there must be a window somewehre)...the black will fade with in a year or two.
To avoid having to constantly worry about how clean the rug looks, you should pick out something with more colors and patterns/textures to it.
If you are drawn to the zebra, but are fearful of the white (as you should be)..then maybe you'd like something like this?
http://www.homedecorators.com/.....a_Rug/910/
Here are some more that have black in them, but are not a solid black:
http://www.homedecorators.com/.....a_Rug/270/
http://www.homedecorators.com/.....a_Rug/270/
http://www.homedecorators.com/.....a_Rug/210/
http://www.homedecorators.com/.....a_Rug/830/
http://www.homedecorators.com/.....a_Rug/240/
http://www.homedecorators.com/.....a_Rug/220/
http://www.homedecorators.com/.....a_Rug/810/
http://www.homedecorators.com/.....a_Rug/910/
http://www.homedecorators.com/.....a_Rug/210/
http://www.homedecorators.com/.....a_Rug/820/
http://www.homedecorators.com/.....a_Rug/210/
http://www.homedecorators.com/.....a_Rug/210/
(Sorry for so many links..I wish there was a way to put them all in the cart, then link the cart.)
Another option would be to go with a very traditional Orientalesque rug. There is something modernly classic about pairing a traditional rug with contemporary furnishings. (Of course, I am biased to that idea because that is what I have in my family room).