Thank you all

If we choose the staircase instead of a wall it would be a very modern looking one. We saw a glass style staircase in one of the display homes and dh was the one who said he loved it though I was thinking the same thing

It was one of those glass staircases thisisme posted on one of her threads a while ago.
Yesterday we talked to our builder rep and I mentioned to her if we keep it open like it is on the plan we would like to have a staircase with glass sides but she said it would cost quite a lot and you wouldn't really see them anyway.
The staircase we will be having in our new house is not a long one but is made up of 2 small staircases 180 degrees to each other joined by a small landing.
If we choose the wall instead of a staircase then I liked Julie-Ann's idea of having more space and that it would be easier to put the furniture with the walls. And yes for the glass doors too

We have an appointment with her again on Thursday morning so that is why I needed to know all this before we see her again.