All of those options are beautiful. The sticking point is, once you buy them, there's no going back.
The reason i ordered full acoustic analysis of my room and received realistic 3D computer model of my room. Liquid nails is what i'm using, pretty easy. Panels can be removed (it will require restoration of the surface of the walls or ceiling, not the big deal, but dirty job). But i want to nail them only when i'm sure it will be nice, that's why i;m going step by step.