Very nice work HS, i also did something similar for a medal proposal in which i made a few medals:
If your aim is to give it a shield look then i think the current style would look great with a few tweaks with the colors and contours. If you wanna give a coin shape then the inner figure should be embossed\Raised. Also on the edges you can apply a gradient for uneven distribution of light so that it gives it a some realistic look.
As for Gold text style, would this suffice?
If you want then i can PM you the .zip file containing the style, you would need photoshop for copying it.