What is the style of the table? Maybe you could have a piece of marble fitted to the top?

The black leather sofas are the ones we currently have, but the modern one is in the family room. The antique one is currently in formal lounge, but we are not necessarily planning on keeping it… I am so complicated, aren't I :(

WILDWOOD DESIGNS! Unsure if they are on houzz but in gladesville and do amazing big tables.

I am in agreement you can effectively mix metal finishes in a room, without detracting from either. The silver finish of sofa legs is not that noticeable and your stunning coffee table is going to be the dominant feature. I would introduce a few other subtle touches of gold in your choice of cushions (vary shapes, sizes and textures), lamp bases , and decorative objects such as vases, etc. Do you already have artwork for this room? A large unframed canvas or one(s) with matte black frames would complement and not compete with the metal finishes.