That's tough. Well, not really. For the price you can get a well build FAL vs a SCAR 17 I'd say FAL. But, if SCAR 17s were $2500ish when I first had one years ago and it was only ONE, I'd go SCAR.
Now the wildcard is the Galil 308. For a good FAL you'll pay 1600ish, the galil 308 is about 1700...