Yes and no.
Is your significant other impressed by a bigger gun? Are you of the opinion that it will increase their libido? If so, by all means yes.
On the other hand, if they are concerned about ballistics, availability, price of ammo and other factors from the "real" world...no.
I shoot a .270. So, my basis may be skewed. I've only shot 4 elk w/it, so I am by no means an expert. But, they all fell over, pretty much DRT. I've never really been impressed by the 7RM...except for the fact that I am impressed by its recoil. It is a rival caliber to my .270 and what you get in fps is not significant enough to warrant the recoil...IMHO.
Additionally, there are those out there that would tell you that a .270 is marginal for elk and that "real" elk calibers start at .338. I tend to agree w/that. The .270 is an excellent deer, sheep, goat and antelope caliber and a just an adequete/viable elk caliber. If elk is a major consideration to you, then you need to fling more lead as it doesn't have the shock and margin for error that other BIGGER calibers do (now, if you are of the habit of hitting w/in about 2" of where you are aiming, then disregard that as the .270 is "Heap Big Medicine").
So, my answer is, get the Winnie and if you really have the urge to step up to a bigger caliber., get his father, the '06.
John 14:6