You you're going to persist, you want multiple turning pools. I'd suggest at least Sacred Archivist/Radiant Servant for double your fun from Nightsticks/Extra Turning. There's also Eye of Horus-Re, Dread Necromancer, Azurin Cleric Racial Sub, some dragon-based sub that works the same, and of course, cleric. Not all of those will necessarily stack, but each extra pool you get adds (3+Cha) + (4 x ExtraTurning/Nightsticks).
There's also a template from DMG2 ...hrmm..pg159 Past Life (Su)...Turn or Rebuke as an 11th Level Cleric. LA +5, so it sucks, but hey, it's another source of turning.