with the alteration amour spells you can get a perk which doubles the protection if wearing no amour but being a mage the best magic bonuse i get is from the dragon priets masks, other than enchanting my own is there any good hoods or non armored head clothing with good magic enchantments?

There is a Circlet you can get from the Mage's College that (depending on how high of a level you are) will give +70 Magika.