Which rifle would be the best all round African gun?

If you went on a safari with two rifles hunting everything from plains game to Ele--what would you consider choosing for the "other" gun besides carrying a Heavy Double(450+class,etc) for Buff and ele??

Would you consider choosing the 9.3 Double with a detachable scope due to its weight, handling, instant 2nd shot capability, etc or would you go with the 375 Bolt with its longer range, more cartridge capacity, and better ballistics?

What would be the best choice, gentlemen? Why?

Thanks for all replies beforehand--