As always, what do you intend to shoot and how much do you want spend?
I have a Cooper 54 in 243 and its a hell of a well built / accurate rifle. They run in the low $2k's but you won't be disappointed.
I also have a Ruger 77 in 243 and its a good shooter too. At about 1/3 the price of a Cooper the Ruger is a nice option.
A determination point for me is do you roll your ammo or shoot factory loads? The Cooper is perfect for hand-loads and the Ruger is probably best if using factory ammo.The Ruger is obviously fine for hand-loads and will shoot its best. The point being the Cooper almost demands hand-loads to realize the accuracy of the rifle.