Help Wanted (Needed?)

Apparently I can write, but when it comes to graphic design, I'm a bit challenged.

Decision-making regarding graphic design, even more so.

I use photographs of ceilings for my book covers, and within the next few months, I'll be combining Songbird, A Wider World and Lady, in Waiting into an e-book box set. (Not doing a paperback because it would cost a bomb and come in at over a thousand pages, and no one has the hands for that).

These are my top contenders for the new cover. Each one has their merits - and none of them are connected to the stories. In the cases of Songbird and A Wider World, the ceilings are actually from buildings (Hampton Court and a destroyed monastery) that are locations in the books; for Lady, in Waiting I chose a ceiling that meshed with the story - Margaery's home of Winterset, and the painted ceiling she envisions for the hall.

I don't have that requirement for the box set cover. It just needs to look period appropriate, which all these are, and work with the font used on the covers, which they will. 

BUT I CAN'T DECIDE.

Which one is your favorite? Help a graphically-challenged author out. Please.