Try World of Warcraft: Cataclysm Server on version 4.3.4 Artemis WoW TwinStar.
Server is working with no lags and NPCs can’t run through texture.
Website: TwinStar.cz – Artemis.
Server Forum: TwinStar.cz – Forum.
Server Twinhead: Twinhead – Cataclysm.
Server Realmlists: TwinStar.cz – Realms.