Well PO2 "Ollie" for the most part what has been said here is mostly true but an update to the thread may be in order.
True DSA is considered "THE" only legit game in town and "THE" BEST FAL, but they aren't what they used to be for whatever reason.
DSarms has had CS issues and some of their once famous QC has been lacking in some of their recent recvrs, do some research and you'll find the answers to their recent dip in quality and service.
That being said they are far and away "THE BEST" still!
As it relates to Century all I can say is that their QC has gone up on their most recent"crappy recvrs" (emphasis is mine as the newer recvrs are above just decent!), I have 2 that where built using them and had ZERO issues, I used a very well known pro builder and he informed me when I gave him the recvrs that "these are some damn good recvrs!" and that they went together without issue.
As I have no thoughts on selling my Fals I am quite content with my Century recvr built Fals.
Also as a side note 1 of my Century recvr built Fals outshoots my DSA Fal easily, no not easily VERY EASILY!
so take that into consideration also.
Lastly I have no experience with Enterprise but I do have a Coonan and it is very nice indeed but I have not been able to take it out and shoot yet, but it is a beautiful recvr and the rifle is very well put together and looks awesome.
ALL of my Fals are built using Imbel kits except of course the DSA.....ymmv
good luck young "salt"!