223 is surely the way to go in my opinion. plenty of stopping power to most "farm distances" (here in Ontario anyways), affordable ammo, good for groundhogs, coons and other pests as well.
Which one depends on budget and personal preference. I love my older bolt action Savage. What you really need to add to your shopping list/budget though if you go with a 223 is a good scope. A quality 3x9x40 is the minimum I think.