Depends what you're trying to shoot. 1:9.5 will stabilize most standard bullets up to 175gr, and will get you into the 160s with high BC stuff like ELD-X and bergers.$700 -1000 is not crazy, many rifles are being listed for $2500+, which I think is most likely insane and unnecessary.
Tikka changed to a 1 in 9in but the older rifles can have a 1 in 9.5 or 1 in 10 twist rate, when shooting long bullets that will cause serious stability issues.
I have had bullets hit sideways when pushing twist rate and my 222 does not like anything longer than a boat tail 50gr, 55gr and she starts to open up quite quickly.
If you're looking to shoot the high BC 175+ stuff 7prc is the easy button, no factory Rem Mag is gonna have the twist you need for those as far as I'm aware (175ELD-X calls for 1:8.5 and I don't know of anyone making a Rem Mag with a twist that fast)