Love your art and how you have it displayed. I would do one large mirror, not the entire wall.

If you're set on a mirror perhaps an oval one with a frame the same colour as the coffee table. And make it a thicker frame.

Thank you all for your reply. Allison i think you're right. I'm trying to edit the post but it seem the option doesnt works.

About the corner table with a lamp. What should be the height of the table?

I think a large mirror with a gold frame would look lovely there!

The table should be about the same height as the sofa arm