Do you have any museums nearby? It's actually not such a bad idea.

The one near my house (The Minneapolis Institute of Arts) have rails in the ceiling with spotlights. You can move them and direct them in different directions. Being that they are in the ceiling they are out of the way. I like the idea of lighting from above.

Hope that helps!

Wish I had a significant other putting pressure on to hang more of my art on the walls...