I agree with James McMurray.
As you cannot acquire Sanctified Ki Strike until level 10, having 14 in Charisma for the first nine levels of your career is going to hurt. Because basically, it doesn't do anything.
On the other hand, Strength 14 exceeds Sanctified Ki Strike's ability to deal damage to most creatures, (still useful when fighting animals, vermin, and a host of other non-evil opponents), and is only exceeded by half a point of damage by that ability against undead and outsiders of the evil sort. The only real gain the feat allows is the penetration of damage reduction. Having a decent Strength score is also a boon when fighting creatures immune to your stunning attacks.
Having a higher Strength also allows for other options, which is never bad; you can resort to wielding weapons, and gain access to the Power Attack/Cleave feats, or Eagle Claw Attack, or Earth's Embrace (Str 15), should you be so inclined.
Stunning, then grappling and dealing double damage (Earth's Embrace) will lead to the combat being resolved quicker. Strength is still used to resolve grapples.
Personally, I'm more for having as high a Wisdom score as possible, in order to make those stunning attacks count (together with Intuitive Attack), and avoiding the Sacred Vow chain, but going for Pain Touch and/or Weakening Touch.
So feat progression may look like this:
Ability Focus (1st) (If allowed)
Stunning Fist (Free)
Improved Grapple (Human)
Combat Reflexes (Free 2nd)
Intuitive Attack (3rd)
Earth's Embrace (6th)
Improved Trip (Free 6th)
Weapon Focus [Unarmed](9th)
Pain Touch (12th)