As the rebirth of 25 cals grows in popularity, largely because of the new high BC mid 130 grainers, why not put at least an 8tw on it. You may have no interest in shooting those heavier bullets now but with an 8 twist you'd at least have the option to if you ever changed your mind versus with spinning on a slower twist barrel you'd never have at least the option too.
A 25-06 has a pretty decent size case about the same case capacity as the 6.5 PRC. The 133/135 Berger's or 134 ELD-M would be a great match for the horsepower of the 25-06.