Whether used on the exterior or the interior, the Tuscan order adds a touch of classical formality and traditional "always been there" feel — without the overall stiffness of the Doric or the exuberance of the Corinthian. Placing the columns at an opening between rooms makes the transition from one to the other all the more special.
This is as example of columns in a smaller doorway. Your space is a bit bigger, but this shows columns in a family house with white trim and painted walls similar to what you have.
http://www.italmodern.com/prod_detail.asp?product_id=294
:) Rhoda