My pre- war is amazing. Very early gun. Still very accurate. The stock was atrocious for scope use. I put a Rimrock on it.
The three Pre-64 Featherweights I fool with [My son's, a friends and my BIL's are good rifles not the equal of the pre-war.
Youngest son has a post '68 PF. Exceptional rifle. Maybe better than the pre 64 FW's.
I have two mid 90's rifles, an SS Classic in .338 and an All-Terrain SS-Synthetic '06. These are the rifles I would build customs on. I would try to get one of the bolt shrouds with the gas block though.
I don't have any experience with the newest ones but I am leery of the trigger so I will likely avoid one for a while.