Hi Joe, this was a first attempt to get the feel of it. Normally I avoid texturing the main subject to this extent. You are right, adding more depth to background would give a nicer isolation as well.
Ironically, I so much enjoy finding the balance at which point degradation of image technical quality is sufficient to amplify the viewer's emotional response, yet is still faithful to our pixel peeping:) Here is a slightly warmer rendering, more reminiscent to the yellowing of the older paintings. I imagine, it was not painter's agenda at that time to deviate much the white balance to the warmer tones:)
and this one is per your suggestion:)