I know I'm throwing you a curve ball, but, I like the 7x57Mauser a lot. I know that NEF currently doesn't have 7x57 barrels currently in stock, but this is a fantastic round, drops deer dead easily, and kicks like a kiss.
If you reload, you can jazz up the round. I only lost one deer all the years I was using it, and that was when I tried "Hansen" ammo, that Yugo ammo, ran like the car, the bullet hit the deer in the shoulder and broke, the deer ran away, I looked for it for a long time, and couldn't even find blood. The brass also wasn't reloadable (even tho it was boxer primed), because of the way the rim was made, it didn't fit in any of my shell holders.
I learned my lesson, use only American ammo for hunting. If you look around, you'll find some older 7x57 barrels for sale. Any of your choices are good.