2/2 Imp HoJ vs 2/2 Divine Guardian
To non-Paladins: Hammer of Justice is an on-GCD stun/interrupt that is on a 60 second cooldown. With 2/2 Improved Hammer of Justice and 2/2 Judgements of the Just this could be taken down to 20 seconds in 3.2, however as of 3.2.2 it can now only be taken down to 30 seconds.
It was primarily useful as a backup plan when an interrupter was late or dead or something and for Faction Champions as pseudo-CC. With the nerf (thanks again, PvP!) I can either choose to have 30 second HoJ or 50 second HoJ and the improved Sacred Shield. I typically do have a Holy Paladin keeping SS on me, however, so the main benefit of Divine Guardian would be for the better raid wall which is also only useful for certain fights.
Not decided which to go for yet, but eager to get a few opinions on the matter.