I think I can pare your list down a bit.
Davis is a no-brainer, primarily for his speed as a pinch runner but also because he's better than serviceable as our 4th OF'er.
I don't want to see David Price on that roster based not only on his injury status but also because of his "small sample size" in the playoffs.
Holt will probably make it because if his flexibility, but I see him as only playing in an emergency situation since we already have an extra IF'er and an extra OF'er.
That leaves one spot to fill. That one will be filled by whatever someone does in September.