I'm not keen on turning because then it might as well be a cleric/fighter with a template slapped on. I'd rather make it more distinct. I do like the idea of it interacting differently with undead, though. Hide from undead on permanently, perhaps?
Rest of the spells:
1st level--cure light wounds, divine favor, protection from evil (D), remove fear, shield of faith
2nd level--bull's strength, cure moderate wounds, hold person, shield other (D), sound burst
3rd level--cure serious wounds, dispel magic, invisibility purge, protection from energy (D)
I'm not sure if it has spontaneous healing or not. If it does, we should specify, and replace the cures above with sanctuary, aid and prayer, respectively.