Tough decision. I think the 7-08 and 6.5 Creed might be two of the best, all-time, all-around cartridges for anyone, ever. Push to shove, I'd be inclined towards the 7-08. A modern, SA 7x57 and I think it's indisputable what one can do with a 7x57. It's a life-time BG chambering.
My one and only 7-08 elk kill... 150 NBT: