If you go on guntrader and hit select New and 243 there are plenty to choose from, Tikka, Winchester, Howa, Browning, CZ, Savage, Ruger etc. all should put factory ammo into a 2" box at 100 yards with the right nut on the butt.
I agree you can buy a really nice secondhand sako, mannlicher etc. but you have the added concern of what type of life the rifle has had, most will take a lot of punishment but its always nice to get "New" and have all the things (books, Warranty etc,) that go along with that.
Good luck with whatever you get.
regards,
Gixer