Rather ambitious, given the action type, caliber, and target sizes, but assuming the weapon/ammo/shooter is up to the challenge, then I'd say 4.5-14x or 6.5-20x variable scopes (or similar power) would be a good balance between weight and usable power under field conditions. My brand choice would be Leupold because I'm most familiar with their products, but I suppose Zeiss or Kahles would fill the bill as well.
I have an Accushot 9-32x56 ill mil dot scope on mine. its a cheaper model from the gun show. holds zero well, even on .300wsm . side focus is a plus. 1/8 moa adjustment with "twist locks" on the knobs (a plus) I love mine!!! works from 50yds to 700+ yards if your up to it. Mine is on a Bushmaster Varminter 5.56/.223