RE: Elk gun
Having another rifle is just like and extra piece of cherry pie can't get enough. The 270win is sometimes underrated for larger animals but it does it's job everytime. Just like anyother caliber with a decent shot placement.
I use just four main rifle out of my collection, the 270win, the 300win mag, the 375h&h and the 22-250. The rest sit in the safe until I go play at the range. hmmmmmmmmmm a new hunting caliber. I'd have to go with something I'm totally unfamiliar with like a 50bmg. lol.
I think a 300win mag might appeal to you if you want to step up alittle on the 270win in the power class. But its totally not neccesary.