The new GUN DIGEST has an article on Makarovs, from all sources: East German, Soviet, Bulgarian. Very well done. Compares the Mak to several other guns, but not, alas, the Bersa.
The Bersas I've seen seem to be very well made. If someone here knows more about them, let us know what you think of Bersas. In general, other Argentine guns seem solid: FAL's, "Browning" HP's, Sistema Colts, Ballester-Molinas, etc.
Lone Star