I’d look at a 30-06 Tikka or one of those 280 Ruger M77 that have been mentioned. Your wife could use your current 6.5 and both rifles would be a step up in power from the 6.5 without punishing recoil and ammo available everywhere for the 30-06 and most places for the 280. The Tikka would be a lighter in weight rifle from the Ruger and more accurate out of the box. The Ruger while a bit heavier will be a very robust rifle with less recoil than the 30-06 Tikka. Welcome to the forum it’s a great resource for anything outdoors and more.