Having owned the following from your list (FN-49, MAS 49, and a SVT-40) and a Garand, M1a, DPMS FAL I can say that the M1a was the best of that group for accuracy, usability, function and relaibility. The garand was a close second , the FAL, the FN49, the SVT then the MAS49.
The first three are in a group by themselves I think. Far superior.
My favorite is the FAL, but it is easily beat on accuracy... but I really like them.
The M1a and the Garand just make 500yard shots seem easy...