Hi, i tried to follow all of your advices, and in the drawing there are several notes about my work.
All the furniture chosen are "modern style", made by contrapposition of black and white which is perfect with the color of the walls. The sofa subdivide the area in two sub-zones, the dining room and the living room, but is preserved the "open-space" concept.
In the living room, near to the movable with the tv, i left a space in the corner where you can put a table for working, i decide not to insert it because you say that is not necessary, so you can chose if you want that.
Since you live in Milan, I have chosen all the furniture from an italian site who sells great appliances at the right prices, and the total amount is 1654 €, all the info about are in the "furniture scheme". I didn't understand if the current sofa is a sofa-bed or not, but i left space behind it so, if it is needed, it can be opened without problem.
I hope you appreciate, thanks.