Are the masks from the War Store as well? I really like the Zardoz entry, but the Eldar win my vote by sheer excessive quality, great work!
Several years ago I built my own Zardoz head, please excuse the lack of a base (the flying stand broke off long ago), the skeletons are for size:

I made it from a paper Zardoz mask scaled to fit an A4 sheet (300 g/m
2), polystyrene, milliput for the eyes and textured paint. You can download the paper mask model here:
http://godzillu.daa.jp/zardoz/