Holy Paladin - Prenaxx/Naxx

Holy paladin is an amazing healer in all contents of wrath. You can use different talent variations, ( as mentioned in the Holy Paladin guide), change it as you wish. Gemming, gearing is already mentioned in the Holy Paladin Guide

Best obtainable items before entering Naxxramas:

1. Head - Helm of Purified Thoughts - Argent Crusade - Exalted
               Helmet of the Constructor - Utgarde Keep (heroic) - Skarvald the Constructor
               Brood Plague Helmet - Old Kingdom (heroic) - Elder Nadox
               Battle Mender's Helm - Argent Crusade - Revered
               Nightshock Hood - BoE LW

2. Neck - Titanium Spellshock Necklace - BoE from Jewelcrafting
                Lattice Choker of Light - 25 Emblems of Heroism
                Amulet of the Spell Flinger - Old Kingdom (heroic) - Amanitar
                Choker of Binding - Quest "A Hero's Burden" - Scholazar Basin

3. Shoulders - Ferocious Pauldrons of the Rhino - Utgarde Pinnacle (heroic) - Gortok Palehoof
                        Mantle of Discarded Ways - Utgarde Pinnacle (heroic) - King Ymiron
                       Pauldrons of Morbidus - Quest "The Flesh Giant Champion" - a quest in Icecrown

4. Cloak - Shroud of Dedicated Research - Kirin Tor - Revered.
                 Bloodbane's Fall - Quest "The Fate of Bloodbane" - IceCrown.
                 Dark Soldier Cape - Ebon Blade - Honored

5. Chest - Revenant's Breastplate - BoE LW
                 Patina-Coated Breastplate - BoE from Hall of Stone (heroic)
                 Scaled Armor of Drakos - Oculus (heroic) - Drakos
                 Eregos' Ornamented Chestguard - Oculus (normal) last boss
                 Runic Cage Chestpiece - Oculus (regular) - Drakos
                 Chestguard of Unwanted Success - Quest "Battle at Valhalas: Final Challenge" - Icecrown

6. Bracer - Flamebeard's Bracers - Azjol Nerub (heroic) - Anub-arak
                  Bands of Fading Light - Utgarde Pinnacle (heroic) BoE drop - AH
                  Catalytic Bands - Oculus (heroic) - Mage Lord Urom
                  Bracers of Accorded Courtesy - Wyrmrest Accord - Honored

7. Gloves - Fiery Obelisk Handguards - Old Kingdom (heroic) - Herald Volasj
                  Web Winder Gloves - BoE drop
                  Grips of Sculptured Icicles - Nexus (heroic) - Commander Stoutbeard or Kolrug
                  Sparkly Shiny Gloves - Frenzyheart Tribe - Revered

8. Belt - Magroth's Meditative Cincture - 40 Emblems of Heroism
              Girdle of Ice - Nexus (heroic) - Omorok
              Girdle of the Warrior Magi - Kirin Tor - Revered
              Ionar's Girdle - Halls of Lightning (normal) - Ionar
              Crawler-Emblem Belt - Old Kingdom (normal) - Elder Nadox

9. Legs - Leggings of Protective Auras - Oculus (heroic) - Cache of Eregos
               Legguards of Nature's Power - Culling of Strat (heroic)
               Standard Issue Legguards - Argent Crusade - Honored
               Discarded Titanium Legplates - Frenzyheart Tribe - Revered

10. Boots - Skywall Striders - Halls of Lightning (heroic)
                  Mojo Frenzy Greaves - Gund'rak (heroic)
                  Sabatons of Erekem - Violet Hold (heroic)

11. Ring 1 - Titanium Spellshock Ring - BoE from JC
                  Signet of the Kirin Tor - 8500gold in Dalaran vendor 
                  Band of Guile - Culling of Stratholme (heroic) - last boss
                  Annhylde's Ring - Utgarde Keep (heroic) - Ingvar the Plunderer
                  Signet of Hopeful Light - Argent Crusade - Exalted
                  Globule Signet - Violet Hold (heroic) - Ichoron
                  Ring of the Traitor King - Azjol-Nerub (heroic) - Anub'arak
                  Ring of Temerity - Quest "The Struggle Persists" - Oculus

12. Trinket 1 - Darkmoon Card : Greatness - Inscription BOE 
                      Figurine - Sapphire Owl - JC 
                      The Egg of Mortal Essence - 40 Emblems of Heroism
                      Winged Talisman - Halls of Lightning Ionar (heroic)
                      Soul Preserver - Culling of Stratholme (normal), last boss

13. Libram - Libram of Renewal - 15 Emblems of Heroism

14. Weapon - War Mace of Unrequited Love - Nexus (heroic) - Keristrasza.
                       Titansteel Guardian - BoE Blacksmithing
                      Gavel of the Brewing Storm - Wyrmrest Accord - Revered.
                      Beguiling Scepter - Culling of Stratholme (regular) - Mal'ganis.
                      Gavel of the Fleshcrafter - Culling of Stratholme (herioc) - Salramm.
                      Screw-Sprung Fixer-Upper - Quest "The Champion of Anguish" - Zul'Drak

15. Shield - Protective Barricade of the Light - 35 Emblems of Heroism
                   Facade Shield of Glyphs - Azjol Nerubc (heroic) 1st boss
                   Tor's Crest - Utgarde Pinnacle (normal) - King Ymiron
                   Tharon'ja's Aegis - Drak'Tharon (normal) - Prophet Tharon'ja