“best factory rifle available?”..undefinable, but .. My answer: Savage law enforcement or varmint models 10fp etc.., overall best out of box value, least amt of accurizing.. easily upgradeable, weight is around 8.5 (1 lb high).
Your Answer: I would take the Sako A7 in .308, .243 or .25-06, great make, great inherently accurate calibers..low(er) recoil. I have a friend who has one and is very satisfied, he is getting under 1”moa 100 consistently. No comment on X-bolt as I’ve not played with one and not really heard too many things (good or bad off top of my head). And, Rem, you and I have same opinion, though they could be accurized for a little over what your budget is… I do like the VSF for $1K , looks kinda like the modified ADL your daughter has.. .
The tikka's are had to beat. I have one in a 22-250 that shoots .375" with the cheap factory ammo. My brother and a couple of buddies have them and they all shoot .75" ctc @100. And they are very light. The down fall is the scope mounts that come with the rifle are not very good.
PSTIMAC, I am not sure how big of a town Elko, NV is. Just wondering if you knew any Simms from WV
What will you do with the .243? Just put it away and not shoot it? Rather than roll the dice on a new rifle for $1k, how about spending $650 and rebarrel the .243 in 7-08. That way you get the caliber you want, without another rifle and the odds of it being a shooter are much better with a custom barrel and action job than you would with a new rifle.