Peter S's Profile

They often come up on Ebay

http://www.ebay.com/itm/Vintage-60s-Mid-Century-Modern-Double-Twin-Gold-Desk-Lamp-2-Lights-NICE-/261167063786?pt=LH_DefaultDomain_0&hash=item3ccec522ea

There's a T-Shirt out there that says "You don't buy art to match the sofa!" and I tend to agree with that view.

For me, the bigger picture issue (excuse the pun!) is how do your art choices fit in with your broader design style and what is their most appropriate placement, given their size.

Your sofa, with it squared style and wooden legs, has an MCM flavor and this art certainly fits that style. However, for me, the size of the larger piece does not work behind the sofa. The ceiling height makes it look crammed in and anybody leaning back when sitting on the sofa could accidentally touch it.

Moving it to another wall will provide more white space around it. Even just changing it with the other piece will address that problem. That option also puts a black and white piece behind the sofa, taking any pressure off to try and "match" them in some way.