For hunting, you are going to want to go with the 4.5x14. Every variable hunting scope needs a low power setting for closer targets. Even if you intend to hunt wide open spaces, you never know when you are going to end up in some brush and a 6.5x scope will be a handicap there. Even at 400 yards, the 4.5x will get the job done on medium and large game. Certainly the 14x will. This is why 3x9 and 4x12 power scopes are so popular for hunting.
On the brands, I am a fan of both Burris and Leupold. I think the consensus here will be that power ranges aside, the Leupold VX3 is a better scope than the Burris Fullfiled. And I hunt with three Fullfields and think they are very solid scopes.
