Well, as with everything, it all comes down to personal preference. I have had a couple Pau Ferro boarded basses, as well as a Sadowsky Metro with Morado. Absolutely nothing wrong with them.
However... Strictly my personal preference, but I much prefer the APPEARANCE of a dark rosewood over the lighter Pau Ferro or Morado. IMO, the darker rosewood gives a more aesthetically appealing, and dare I say "richer" appearance.
So there is no right or wrong in this case. Only opinions, which almost always clash. 
All that said, most of my basses have maple boards.
However... Strictly my personal preference, but I much prefer the APPEARANCE of a dark rosewood over the lighter Pau Ferro or Morado. IMO, the darker rosewood gives a more aesthetically appealing, and dare I say "richer" appearance.
All that said, most of my basses have maple boards.


!!!. 
