I made this for myself. I figured I would share it. If I decide to learn to work with meshes, it will look even nicer.

Just add the textures folder into the Data folder of your install directory.

Zalzama's HD Ebony set: http://www.skyrimnexus.com/downloads/file.php?id=2544

To replace the Ebony helmet with this, use this plugin made by Dankrafft: http://www.skyrimnexus.com/downloads/file.php?id=2505
I tested it, it works perfectly. This is only if you want the heavy armor attributes. The nightingale hood will still be changed in game.