Of the choices you listed, I'd take the Tikka in 6.5 CM.
This.
You didn't ask, but I'd do the special-run 6.5 CM Fieldcraft with the no.2 barrel over all you've listed (I wouldn't do the "regular" SA Fieldcraft with no.1 contour).
Or just get a 270 in the Barrett Fieldcraft. That would make the most sense.