Usual caveat - it's glorious and far, far, far (far far far far) better than anything I'm doing.
That being said - I see what you are saying about different woods - maybe a black ebony on the 'border' to help it pop.
Also another thing I see is that, at least from the camera angle, a lot of the work you've done disappears in the curve of the finished blank and instead of the intricate flower/cross pattern (bottom right) you see what looks like a more typical 'sandwich' segment blank. (ie top/middle/bottom).
(far far far far... far.. better)