Now that the process is underway, I've been looking back at some of my inspiration images. I'm not sure yet if I should keep just the chair rail molding:
add picture molding below the chair rail:
keep the same paint color on both halves of the wall:
or paint the entire bottom half white:
or paint the entire bottom half a totally different color:
Decisions, decisions! Maybe I should've thought this through more before starting? Which look do you prefer?