Walnut's always a winner in my book, especially if the grain is cool. This typical wood may better compliment the otherwise atypical Scorpion body shape.
I'm also leaning towards the oil (matte?) finish over the shiny lacquer. I find that with flat-finish guitars, I feel a little less anxious about scratching, dinging, buckle rashing, fingerprinting, etc. on the surface.
I was a little concerned that purpleheart or vermilion may just look too purple or red...I don't want the bass to necessarily look like something that Prince would play. I still think, though, that either of those tops would look better with chrome hardware, which I'm partial to.
Thanks for the input!