You can single group the plate cycle to get the no-drop armor pieces. But you'll need to either group a lot or spend a lot of coin on the Gems to complete the quests.
http://wiki.project1999.com/Paladin_...n_Armor_Quests
I still use a full set of Imbued Dwarven plate on my 58 pally. It's a solid set. But that's mainly because I'm too lazy/cheap to work on the set.