Given that, here are my sets that I'm using now, and will likely use until either I get bored of them (unlikely) or Pandaria (very likely).
ARMOR OF RADIANT GLORY
This to me is the best paladin tanking set in game right now. The white and gray accents are lovely, they match well, the feathered shoulders are delicate but evocative, and with a good tabard, you can hide the hideous plate-belly-shirt. Of course, snagging Holy feet and belt to complete the look is important and you can luckily buy both of them from Valor vendors along with almost all the other pieces. So, if you can win the Shoulders the rest of the set can be purchased with Valor making this an easy 'mog to put together and yet I almost never see people in it.
The accents here are the weapons. The sword is Honor's Call which comes from being Exalted with Honor Hold in Hellfire Penninsula (many thanks to Maara for suggesting the sword.) The shield is the current Season Conquest PvP shield (which I splurged on despite the fact that I don't play Holy-PvP). Here are all the pieces I'm using. Oh, and no helm, no cloak.
|Shoulder||Shoulderguards of Radiant Glory|
|Chest||Chestguard of Radiant Glory|
|Tabard||Argent Crusader's Tabard|
|Hands||Handguards of Radiant Glory|
|Pants||Legguards of Radiant Glory|
|Shield||Cataclysmic Gladiator's Redoubt|
ARMOR OF VINDICATION
If the objective of PvP armor is to make you feel like a bad-ass while giving your class as aggressive a look a look without descending into farce and brutality, then this set manages the look hands down. Even the helm is awesome! However, the belt is a bit under-whelming so I'm using an off-set belt which matches it quite nicely. Also, I don't have the feet quite yet as I can't splurge on Transmog gear just yet, but I will have the matching feet by the time the set is finished.
However - the sword is what takes this set over the top. Ashkandi has always looked good but it seems to just match this set in a way I can't describe - the colors accent well, the scale and size of it just brilliantly reflects the kind of sheer power and burst Paladins can bring to bear, while being majestic and graceful - it never seems brutal. If it could reflect a subtle, smoking enchantment of some sort, it could be perfect. No cloak, no helm. Pure awesome.