I'm going to interpret "best" as quality of machining, fit, and finish. My vote goes to the 1895 Chilean's made by Lowe. They exhibit a level of craftsmanship only approached by the finest Swedish Mausers IMHO. Next, I'd choose the 1908 DWM Brazilian, followed by the 1912 Steyr, and then the FN SA contract rifles. Spanish and Mexican's bring up the rear.