Since you're going with a curve, i'd save some money and get the action wood or maple core. I've never had any performance difference between maple, action wood, or bamboo when it came to recurves. Some may seem to have a smoother pull with bamboo, but not enough to make that much difference, IMO.
If you were getting a longbow, then I would definitly get bamboo.
Now, some bowyers, like Mark Horne, can make bamboo look really good, IMO, under clear glass. Has a sort of a light honey stain look with the grains showing. Some bamboo limbs are just plain and needs some kind of veneer over it, for cosmetic purpose. LOL!