One thing that no one has mentioned is that the coco-bolo will change color, i.e. darken, radically within a year; especially if it receives any kind of sunlight. There are finishes containing sunblock, but they only delay the inevitable. Coco-bolo will turn a dark reddish brown and much of the flamboyant grain will become muted.
How does a coco-bolo + ??? piece play out over time? If you combine coco-bolo with curly maple (which I've done numerous times), after a year or two it is the curly maple that has the stronger figure, not the coco-bolo.
If you use cherry or walnut, which also change color over time, you run into the problem that Jim mentioned, the sides of the piece receiving more sun will change more than the shaded sides (cherry gets darker, walnut gets lighter). The coco-bolo, being on top, should change uniformly, as long as no part of the top is shaded.