Layering textures and finishes is another key element to pulling off a sophisticated gray space. I like to introduce rich, darkly-stained wood furniture to add depth. Try to bring in rich browns with media cabinets, console tables or serving buffets. The larger size goes much further than a small side table or accent table. Something else in this photo to consider is a zebra print area rug. The black and white combo will work well with any accent color and the rough texture adds another layer of depth.
You don't have to go so bold as to use circus signs or neon letters. Graphic art can be a beautiful framed canvas or print of letters and numbers. The graphic art in this photo is dynamic and contrasting, adding to this room's eclectic and modern feel. It doesn't clearly make a statement, but is definitely the statement piece of the room.
How to find the right credenza. First, figure out how much room you have for it. Next, think about how much storage you need. Then, determine what kind of storage: closed cabinets with shelves, filing drawers, open book shelves? Last, think about the tone you want to set in the room: To create warmth go for a deep wood finish; to keep it light and airy, try a light finish or white.