if you dont lke whats been said so-far try deadric/ebony heavy armour, you will look more like a death knight but you will look evil

Ebony armor is sick looking. I haven't got ahold of Daedric armor yet. I'm leveling up my smithing and I have a few daedric hearts.

Those are the purple robes that have been mentioned several times already.

they are both excellent for a death knight (which i have been meaning to make)

Ok, sorry.

Why not?

Nope you fail to understand that his opinion is the one I chose.

Headgear should be an Execution Hood.

<-------- I am partial to black with a hood

I think there are actual "Necromancer Robes" in the game, I've looted them off quite a few mages in dungeons. Standard black with a matted green skull on the front.
I don't know if they can be disenchanted though, since I can't find their stats anywhere. Weird.

Edit: The only thing I've found is that their effect is: "Magicka regenerates 75% faster."
If on the PC, you can obtain them with the console and try to disenchant them. (0010710d)
I also think they're buyable from NPCs that sell magical apparel. Have to check though. I don't think they're very rare, common actually.

Falmer robes are good. Unhooded are best so you have an extra piece to enchant.