Does the armoir house a television? Knowing whether there is a TV to work around will help you get better advice. And do you love the armoir even though it doesn't "go"? If you do, you can work around it.

The armoire looks like a classic piece.

I would anchor the sofa on the wall, facing windows (which is also the best sofa position in your room - from a Feng Shui perspective).

Since you would like to hide the computer - perhaps use armoire. You could use it as an office.

If you are wanting to get rid of the armoir, I would aim for something like this:

You could use modular pieces from Ikea, etc and build a tv/desk wall on the wall where you currently have the console. Place the sofa across from it in front of the window with the matching chair with its back to the entry. Use two more chairs, a settee, or a bench on the side where the armoir was.