I've finished one of my Celestian Insidiants for your viewing pleasure. 

I'm happy with the way it's come out in the end. The purple inner lining of the cloth gives a bit of contrast to the brighter colours of the rest of the model. the only thing I'm not sure about is the eyes... The red is blending in with the Fleur de Lys on the helmet, and I'm considering changing the lense colour. Not sure to what though: A quick mock up with green and blue below. (yellow would be swamped by the surrounding gold)

Also, some updates to my Chapter Master. Added in the blue flame on top (to contrast with the red banner behind), touched up some highlights on the gold/bronze areas, as well as lightening the parchment/scroll work.