Hi Ernst,
I would recommend Self-Adhesive Matte Propylene Banner (8 mil) for permanent indoor adhesion plus really good gamut (after profile) on my Z3200. However, it should be cautioned that installation on a wall can be problematic, with lots of pesky trapped air bubbles, unless you're an experienced sign installer with highly developed squeegee skills!
That's why I tend to always use Photo-Tex. I have run probably a dozen rolls of this material on my HP Z. Its gamut is not quite as high as the Adhesive Matte Propylene (fabric versus smooth white plastic), but it goes on -- and off -- with ease on a wall! Photo-Tex came out recently with a version of higher-tack adhesive that is more aggressive (Phototex "Ex"), and another version with a higher white-point (Phototex "OPA"), but I have never used anything but their "standard" aqueous-based material.
For the Photo-Tex I built my best profile around Hahnemhle Textured Fine Art Paper preset. There is already an HP preset for the Self Adhesive Matte Propylene.