Darker than Macassar Ebony. This board can yield a slightly thicker top if desired.

Very tempting...but I'm still spoiled by the ebony.  It'll always be the most exotic wood in the world to me.  
 

What does the sound compare to?

There's a little 5 minute movie here, the soundtrack for which is a Ziricote Alembic.  That might give you some idea.

Thank you