Just when I thought it couldn't get any better, you do this image! Once again, its great! I think this one's now replacing your last one on my desktop...
You've really brought out of the fractal in this one, and your choice of colors is very good as well. The blue in the middle does a brillient job at enhancing the gold. I also like the shade inversion between the center band and outer bands (and the blue circle). The structure is perfect in my opinion!
Great job, well done!
I agree, Kristof. Nice image. May I make a suggestion? Think in terms of contrast. You've got some good contrast between light and dark, warm and cool. I think it may have too much texture - like there needs to be an area without the fractal texture for the eye to rest upon. Just a thought.