a really good shield that i know of is spellbreaker, rating 17 and its worth 16,500 dollars or whatever they call that currency. you get it for doing peryite's daedric quest. you have to be level 10 and you have to just kill the 5 necromancers in a cave and its a pain but in the end the shield reflects spell 30%.
secondly, some strong armor and best weapon in the game, no joke, you have to kill umbra. you can do this whenever you want in the game, u encounter her on a quest. me and my friend got it when he was level 2. he used a money cheat, but all you need is 5,000 dolars. sfirst, no matter how you get ur 5,000 dollars, you go to Three Brothers trade goods (in the imperial city market district) and buy apothesis if you do not have it, i believe it is the easiest way considering umbra has some of the best armor and the best sword. you then have to go to Vindasel which is like a mauseleum, it is directly southwest of the imperial city waterfront across th water and along the road. to help more, it is near a bridge, then search along the western side of th bridge. once you get in there make your way to the bottom. Once you see umbra, the person and the weapon, You enter Umbra's room in a balcony/gallery area. Near the broken section of railing, it is possible to jump over to the narrow sections of ledge outside the railing. Although it may seem like Umbra should be able to attack you from the balcony, she cannot.she will not attack until you attack her. She is amazingly strong. take the apothesis out and either A) start zapping her while running backwards, or B) hide on one of the ledges or columns in the room because she has no bow and arrows. 5-6 zaps with apothesis should kill her, do not yield your attacking or she will use magic to boost her health like crazy. Once she is dead take her armor ad weapon, they will be named umbra's ebony cuirass etc., and her sword is just called umbra. it is a one handed sword that when your attributes are good, does 28 damage and soul trap for 120 seconds. if you have any wuestions, send me a message. hope i helped.
one more thing, all umbra's armor can be enchanted it is not the best armor but the blade "umbra" makes it all worth it.