I don't know about the Sako 75s but I have a Sako L691 and love it. This is the most accurate rifle I have ever owned/fired.

I don't know about the A-bolts, but an old boss of mine had one and always had problems with it.

I had a Browning BAR (parts from Belgium, assembled in Portugal) and I never liked it as much (first rifle I sold when I got short on money).

IMHO, I would go with the Sako, but I would look for an older one. They are hard to find, so that might tell you something about how their owners feel about them.