270 Win would be a good choice, been around forever, ammo is easy to buy anywhere and reasonable price.
Stainless barrel is good, less chance of corrosion longer life too and as it is easier to machine they tend to be better out of the box accuracy.
Boss system is not exactly a gimmick but it is finnicky and has to be changed for different bullets, if the rifle wont shoot well the boss wont fix it. I took mine back after two weeks due to a faulty bolt and they were talking three months to get another.
Got four Rem 700s all great out of the box and real tack drivers.
The WSM wont give you anything the std 270 will not do in real terms and ammo is dearer and harder to get, barrel life will be shorter for a gain of a few fps.
I think you mean the XCR which is the current model with extra corrosion protection, great rifle you would not be sorry doing a deal for that.
