Which color temperature for front door exterior lights?
This is a real personal choice.

IMHO
The daylight bulbs give a harsher whiter light similar to a mercury vapor lamp. This gives things more of a stark steril look.

The cool whites are less harsh.

The warm whites will be the closest match to a standard incandescent. So, if you have some incandescents still installed on the outside of your house the warm white would match better.

Or you could buy all three, take them home and try them out and then return the other two you don't like.

Good luck with your project!