FALs are awsome. I have 2, and am working on getting another built.
As mentioned above the recoil is not bad once the gas system is set properly and the ergonmics are quite nice. The gas system is not hard to adjust. If it is over gassed, not only will you get alot of recoil but you could also do damage to your gun. They are a joy to shoot and come in many different flavors.
The carry handle can be removed, and a filler piece inserted. Or you can have one built on a receiver that does not have the slot for the handle(Dan Coonan makes some)
Older DSA guns are ok, if they were built by DSA. It is the same with Entreprise, guns they built are usually ok, but I would not build one on a stripped receiver. Century guns are hit and miss. Try to find out if it was a kit build or a factory built gun.
Most parts are interchangeable between metric and inch pattern rifles withe the exception of Israeli rifles. Alot of Israeli parts are interchangeable, but some are specific to Izzy guns. Metric guns will only use metric mags, Inch guns can use both inch and metric mags.
Buy it, if you don't like it and it is on a decent receiver you shouldn't have any problem getting rid of it.