Spiral Staircase Possible Shapes & Designs

I did a bit more research into spiral staircases for my stand because I really do not want my stand to lose its luxury and elegance from some horrible spiral staircases protruding from it but rather for them to enhance it.
From my research I made up four possible shapes of spiral staircases for my stand.

Out of the four I think 3 and 4 have a bit more elegance and luxury about them but also better structure due to the straight upright forms. I also think I could do a lot more with them design wise.

 

I then remembered the spiral staircase from the latest Doctor Who Christmas special which coincidently falls into the same era I'm focusing on.

 

I think this spiral staircase is a great influence for mine because it seems beautiful and dreamlike with its fine filigree detail.

 

Time to draw more staircases!!