Bathroom Inspiration: What to do with the walls?

At this point, we've pretty much picked out everything for the bathroom, but we have yet to decide on the walls. Originally we were going to tile halfway up, then we talked about just painting the walls, then we talked about grass cloth wallpaper, or some combo between these.

We' both really love grass cloth wallpaper. I really love variations of gray or greige. Now that we are going more neutral and simple in our bathroom reno, I like the idea of adding subtle details like the texture of a grass cloth wallpaper.  I originally wanted to do a patterned wallpaper and Jim wanted to do a  darker charcoal paint, but I think this will have a greater impact while allowing the room to stay light and airy.

I really love what was done in this space:

Traditional Powder Room by Chicago Design-Build Firms Orren Pickell Building Group

We're on the fence though because there is a lot of moisture in the room since it's so small. We also don't know if it's worth it to higher someone to wallpaper such a small area. We thought about doing it ourselves, but if we're paying for everything else in the reno, we don't want to mess it up with this one last piece if we make a mistake with something we aren't familiar with. 

 

Would you go tile, paint, wallpaper (grass cloth), or some combo of these if you were us?