Bamboozled?

I'm thinking about specifying a bamboo in one of my projects, an MRI suite addition. Originally the architect wanted a bamboo for an interior space, so I spent a ton of time researching that--but then something with the proposed atrium fell through and we aren't considering it for the time being.

So then I thought, maybe I can specify something for an exterior courtyard in the project. I'm thinking about Fargesia robusta. I really wish I could use a Phyllostachys, but it seems that they are pretty invasive and would spread everywhere without the maintenance that hospital staff likely cannot provide.

I am having a hard time deciding on whether the straight species, or the cultivar 'Green Screen' would be better. I'm concerned about the plant hardiness, and overall size. I wanted something in the 20-25' height range, but it doesn't look like I will be able to find something that is a clumping species, cold hardy, and that tall.

So, for the time being, F. robusta it is. Now to find an appropriate ground cover (if any at all). I wonder whether this bamboo landscape will conflict with what I am proposing in the front of the building...