Any of the above.
BUT... the caveat is whether you intend to do much customization, or accurizing with a gunsmith down the road.
Aftermarket accessories are weighted very heavily to the Remington 700 and Savage firearms. Those are our preferences for that reason.
Caliber is going to depend on what game you intend to hunt, and at what distances.
If you're going to shoot groups, you should consider a Varmint contour barrel. Heavier barrels don't heat up under the faster/heavier round counts usually associated with target shooting and generally shoot tighter when they heat up.