"Basically, the higher the bed, the more physical and visual space it's taking up," says Orlando Soria, West Coast creative director of Homepolish. "A lower bed will make your bedroom appear larger and more open.
DIY upholstered bed frame and headboard. Great pictures of the process of building it on the linked site. Maybe something like this in the master bedroom with a rich tapestry fabric on the headboard and complimentary plain fabric on the box.