We have talked about this, but I am thinking a mantel would add a lot of texture and depth to the living room, and be a nice focal point/divider of the aforementioned Two Spaces of the Parlor.
Mostly, it would be an opportunity to lean things on other things and put more art more places.
I think we'd definitely need a big ass mirror. Perhaps the one that came with the dressers?
(Insert obligatory photo of Jena Lyons' house somewhere in here.) (Also Keri Russel's.)