Go with the 7 Mag. The ammo might cost slightly more than say 30-06 but I prefer the 7 mag cartridge personally.Though you wouldn't go wrong with any of your choices. I would advise against buying the mossberg rifle. I would recommend either a Savage or Remington 700 you will be happier in the long run.If you can find a Howa 1500 in yourprice range it would be a good rifle. The Howa1500 is the same action the Weatherbys used to be built on. You can check the pawn shops and gun stores and possibly find a usedrifle in your price range, Though I think you should save a couple hundred more.