Which importers/ builds are quality and which are junk?

How high of quality are the 65s compared to the Bulgarian and Russian guns?

It seems that the TGI rifles are built on old FEG receivers. They use amd parts kits with the original Hungarian bbls. They add a extension to the AMD  break to make it legal length. I have been on the look out for one of these my self.
Then there is the century rifles that use a non FEG receiver and use a new BBL with the AMD break on it.
If it were me I would try to get the TGI build.

Winna  Winna  Chicken Dinna !!  

I've had both Century and TGI products.  Both worked well, but the TGI, for reasons given above, is better.  More likely to have issues/need tweaks with Century.