For my tastes, I like either ebony binding or ivoroid when working with a guitar that has dark back and sides. I think when you mix too many wood colors in there, the overall aesthetic starts to lose its cohesiveness.
Here's ebony binding on my Carpathian/Madrose Brondel.
On my LeGeyt, Burton actually bound the guitar with the same color as the back and sides, which I though looked pretty slick.
One guitar Brondel built with ebony back and sides had snakewood binding. I thought that looked awesome, but it has to be paired with a minimalist rosette, I think. Definitely not a "broken glass" theme. I think if you want a stand-out rosette, you need to go with muted binding. The nicest stained/broken glass designs I've seen have come from Jason Kostal.
