Of the three and your intended use, I say get the .338 Win. Mag. Load it full throttle with some 225 grain Barnes TTSX bullets and kill every thing in Alaska all season and every season. Do what I did long ago, find a used Mod. 70 "Stainless Clasic" and customize it. My 5 shot 8 lb. Mag na Ported beauty is the perfect Alaskan rifle.