We watched Willy Wonka a week ago or so and the boat tunnel scene scared the crap out of my kid. When I was little, that scene freaked me out too.
I remember liking this one, but I haven't seen it in decades.
Not sure how bubinga is gonna look against walnut. Not much contrast or complement there IMO. If you want it to pop, how about maple? You have the maple back panel, after all. And if you wanted a more subtle complementary color, I think cherry would be a better choice in the red family.
Is the maple ply a design decision or could you not get walnut? Now that you have maple involved I might lean toward maple for the pulls...will kind of tie everything together and justify the maple backs. That way people won't be as shocked at the stark white when they open the door. And by people I mean you and your wife. LOL