RE: Still trying to decide...
would have to say 270.. just from the stand point of ammo availability.. around here it's as available as 30.06. Any of these IMO will take down most things you will hunt. I guess you would have to ask yourself which one based on what other guns and caliber's you own. I just purchased a 7mm-08 and find it to be one of the best cartriges i have ever shot. I was looking for a 4th rifle and considered the 280/270 but already had a 30.06 so there was almost to much overlap. Even though the 7mm is quite close, it has about 1/2 the recoil and is a pleasant gun to shot at the range vs the 06 after a few boxes of ammo.