For me, and all things being somehow equal (?), after Brazilian RW I tend to like African Blackwood and Honduran RW (in that order) as substitutes for my ears, but Madagascar and Amazon can be good as well. I think the quality of all these woods can vary quite a bit and unless you are dealing with a smaller shop or builder you trust, you really don't know what you're getting. My experience has been that the right builder with the right woods can do wonders... regardless of where the wood came from.
And when all else fails, I just go with mahogany.
