I recently started playing around with the glitch that allows you to equip multiple helmets and/or hoods, with wich you can mix them up as one helmet.
I know two nice combinations, one is with the masque of clavicus vile and the falmer helmet, and the other is with the orcish helmet and the masque of clavicus vile.
Anybody does this too and knows some cool combo's?

http://www.uesp.net/wiki/Skyrim:Jewelry#Circlets Read the circlet part it shows everything that can be worn with two things because of being wrongly categorized as a circlet not a helmet.