Man, there sure have been a lot of these kind of posts the last few days. They all seem to head down the same path - Ford vs Chevy recommmendations, then the threads kind of die out for a while, only to start again a few weeks later.

Given that you've already accepted that you want another long gun just because, why focus on the same range as what you already have? Why not a small gun for varmint hunting/target practice, or a really big one for the really big game? Other than that, if its the 270 or the 308, flip a coin. Neither will do anything that the one's you already have don't do.