Input from a Die Hard FAL fan
I bought a brand new DSA 21 inch medium contour barreled FAL with hooded match peep sight about 6 months ago. Brand new on domestic FAL receiver (which is the best production in the world right now, no I dont work for DSA but after I bought this gun I became a believer, Halleleuia!) Go to the DSA website and look at the rest of the great specs on this rifle. Everything is brand new in the rifle and its about $1700. Throw in 50 excellant condition FAl mags made in Autria for about 10$ each and you got yourself a full combat rig for about $2200.
The other posters here are corrent about surplus FALS only in that perhaps 85% of FALS for sale in USA are built on used surplus parts. As far as new production, all other USA manufacturers dont produce a product worth even test firing. The Surplus Frankenstein rifles are risky to buy unless you absolutely know what to look for, and even then you risk getting a real lemon. As I said before the brand new DSA is about $1700, you can get a really good Frankenstein rifle for about $1200 or so. (Arizona Response Systems comes to mind, they also build the rifles on DSA receivers) Paying anything less you are just going to get a 3.0 MOA rifle, if that, with spotty reliability and a crappy feel.
Just a primer, the best receivers, perhaps even superior to the original Beligian manufacture are DSA. Second are IMBEL receivers made in Brazil. You save about $150 to $200 going with the IMBEL. You can get plastic or metal handguards, the plastic dont heat up as fast. The hooded match rear sight is adjustable at the push of a button to 700 meters. DSA also makes THE scope mount for the gun which fits flush with their receviers. The FAL also has a gas regulator knob which allows you to set the gun for the ammo to reduce the battering of the receiver. FALS also come in Metric or Inch pattern. Inch of course going to England and Canada and Metric going to about 91 other countries. Stick with Metric pattern because the Mags are more plentiful. Also you can have an integrated bipod semi permanantly attached to the gun.
As an M1A owner I know you know that the .223 is a pop gun cartridge in comparison to .308. I have fired about 800 rds through the M1A and I think though, that the FAL is slightly more combat ready and useful then the M1A. The criticisms of the gun, in that the trigger is not the best is true, but you can oversome that with practice and familiarity. The 10 pound weight of the gun is a problem only if you are carrying around an extra 25 pounds on your stomach in donuts and beer. BTW the mags are heavy too, all steel. FAL's field strip easily and frankly, the DSA variety is a tack driver as far as combat weapons go. The mag release is well placed as the bolt release and chargeing handle. Much better for combat applications then the M1A, but of course this is entirely subjective. Another thing, the 18 inch barrel is sexy but it wrecks the reason we go to .308. I want to go through both sides of a car and the tree behind it at 500 meters, cutting that barrel does not help. Take out your Bushmaster Dissapator if you want 16 or 18 inch barrels. Plus the report and blow back of an 18 inch is awful.
In closing, if you want a nice rifle to round out a collection at a cheap price, dont do it just buy yourself more M1A mags. The cheap clones are a waste of money at any price.