I’d Probably go with a tikka. I’ve had great luck so far with with xcaliber barrels but I’d need the barrel before the wait time. Both companies I mentioned, I can find them ready to ship. At least the pva website says that, but than also says lead time 6-8 weeks. I tried emailing them last week with no response. I’d rather go pva just because the ib I found is threaded and I really don’t want that. I’m not sure which is the best routeWhich Action are you using OP?
IBI listed prefits are Rem, Sav, Tikka and Ruger. I've never used IBI so I can only go by what I see and they do not list other actions. If you're using one of those actions then why not try IBI.
PVA does list prefits for multiple actions and I am a customer. I have a 7SAUM screwed in to a Curtis Axiom that has been fantastic. I went back to PVA to have them do the 338 SS for my Bighorn Origin. I also have one of their muzzle breaks, I have nothing but good things to say about PVA.
I have a Bartlein in 6.5CM that was turned by Bugholes and they are also good to work with. Not on your list I know, just adding who I have worked with