My vote - The spalted maple - it is a truly unique piece, especially with the flamed edges....
Only thing with spalt is that it can be soft in areas, and tear out easily when working it.
With Scott doing the build this should be minimized.
I have no doubt that you respect your equipment and this shouldnt be an issue in the long run.
With the harder wood around the edges, it shouldn't ding as easily.
The maple, while a beautiful piece, has been done.
The resulting tone shouldn't be an issue, since you have the PhD in tweakology with the Axe rig.