Which 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