Well, this is the campfire so why not go off the reservation?
With the choices referenced, the 338 makes a lot of sense. Will fit in an 06 length action, components are comparatively easy to come by, ballistics match up very well with the 300 WM out to great distances, and a great selection of bullets these days to do anything you need or want to do... what's not to like? In grizzly country any of your choices would be fine and the .338 would be another fine choice to consider. Flip a coin and you still wouldn't be wrong with any of them...
