Thank you. Your Pearl White selection is my favorite. In fact, that's what I ordered for this image and all other B&W images. This particular one is a bit complicated as parts of the images are lightly selenium toned ONLY and the rest is toned in both lightly selenium and heavily brown.
Funny as you suggest double matting because that is what I am considering. Pearl as a top mat, and Almond (from AlphaMat) as bottom mat.
Another thing I'm thinking is, to float mount this image onto a white 2 ply mount board and use Pearl as an over-mat.
I kind of have to use Pearl as a top mat in any case as this will be one of the piece in a set.