RE: What rifle will cover ALL my needs???
If you would have said deer only i would say the 25.06 but of course you said maybe something bigger later on. Like already mentioned the 308 is a fine caliber as is the 270 but i've always said if i could only own one rifle it would be the trusty old 30.06. The 30.06 will do anything you ask of it and more if you do your part. The ammo is available just about anywhere. Your choice in rifle brand is also a good one as Savage makes a good rifle for the money and for the type of hunting you said you're going to be doing it sounds like a good match. Good luck!