the VEPR's are probably the most accurate, and also have the heavier duty (and weight) receiver, so not all the common stocks fit them, and I'm not sure about the normal mags....
I have an SAR-1. It is not teribly accurate, but I can hit a human sized target head at 50 yards (with a Kobra red dot) without any problem at all (but shots start to string out more as the barrel gets hotter). I love my SAR, great gun for the money (around $300), but certainly no tack driver (my .308 bolt action is for that).