I'm not sure yet, I'm not sure how much I want to spend on it. This is the first time I've ever attempted this so I'm inclined to go cheap, I don't want to spend a lot of money on a bass that doesn't sound good. I'll probably go with a hard maple, those seem to be the cheapest. I want the fretboard to be black, so I think I'll just get the maple and stain it heavily. An ebony fretboard blank(3"x1/4"x28") is like $25, maple is $5. I printed out a section of a 12" radius circle to use as a template for the fretboard curve.