It's usually a good idea to add a couple of arm chairs to your living room configuration. You can do a really fun fabric to punch in some colors ; add some dimensions of the room by varying the height so it's not so flat, and perhaps most importantly, style it up a bit.
Here's a really cool one that we like:
The chair is made by Jessica Charles, a division of Hancock and Moore. The price depends on the fabric, but it ranges about $1400-1600 or so.