Matching chests are a nice symmetrical look but two identical prints are too much of the same. Try to find a co-ordinating pair of pieces, both framed identically, and put one over each of the chests. You can individualize the tops of the chests by adding for example, some flowers on one of the chests and maybe several large scale candlesticks in varying heights on the other chest.

I like the symmetry of matching, accessories can be different.

Try two different prints from the same series, so the theme (botanicals; shells; landscapes, etc.) is the same, but the actual image is different. With identical framing and matting it will produce the effect of symmetry without the actual repetition of artwork. Here are few examples of using prints from a series, and I've also linked an ideabook on symmetry:


http://www.houzz.com/ideabooks/27341/list/The-Soothing-Effect-of-Symmetry