One thing I mentioned before is to not overlook the stock fit and quality. An example that taught me this was a Savage fp10 in 308. It was a heavy rifle at around 12lbs. It kicked hard. Reminded me of all the rem 700 30-06 that I disliked. The stock had a firm butt and didn't fit great. The same caliber and projectile in a different firearm was a real smooth shooter for me. It was even 4lbs lighter.I've shot a Savage 270WSM for about 10 years. I shoot 140 grain AB handloads. I've always had a limbsaver pad on it. I may be a wuss, but I wouldn't call the recoil mild. I ended up putting a brake on mine this year, it's really pleasant to shoot now. If you get the right brake, you shouldn't have to worry about hearing damage, or at least any more then a stock gun.
If you can get her to try before buying, that's the best way to go. If the 6.5cm is an option, I'd go that way. If not, 270win/ 7mm-08. My wife shoots both well. No brake needed.