CZ 550 in 416Rigby for all dangerous game. Scoped with Trijacon 1.25-4X24 or Aimpoint
Rem 700 in 375H&H for plains (and dangerous game if encountered) Scoped Ziess Victory 1.5-6X42.

Rem 700 in 35Whelen scoped with Aimpoint. For plains game
Rem 700 in 300SAUM scoped with Nightforce 2.5-10X32 - plains game
270Win in Styer Prohunter scoped with a Kahles 2.5-10X50 plains game.

The above is what I can draw from. My prefered 2 gun battery would be the 416Rigby and the 35Whelen. I would use 410 Woodleigh SN and Hydro's in the Rigby and Woodleigh 225 grain Protected Points and Hydros in the Whelen.

If I was to take the 300SAUM I would have 155grain Australian Custom Projectiles in medium and hard.