Houzz is the new way to design your home.
venetian plaster finish
like the look - soft, open, warm, grey with cream and light woods
floor to ceiling stone/tile with assymetrical walls on either side (venetian plastic/sheet rock?) and chunky mantle. Would also work with no mantle and be a cleaner look.
cubbies/shelves on either side - assymetric - lower could be used for wood storage
shelves w/ mantle extension
small shelves to left