Why the Series 80 stuff? To do a quick reminder, Taurus USA's President was an former Colt Vice-President. Then Taurus decided to break into the 1911 market, don't you think they took all that advice? As to the Series 80 parts... they are the ONLY effective anti-drop safety. Springfield just puts a stronger firing pin spring (more work when you pull the trigger). Kimber has the most convoluted safety approach... the Series 80 is a durable system.
If you are conscious about trigger pull, replacing the main spring with a light weight spring... or the series 80 parts with the titanium parts. AND everyone is right... pull the series 80 parts out and for whatever reason the gun goes bang and someone is shot... in self defense... a mishandled gun at the range... and lawyers will feast on you.
PS... read the accounts. It seems that the spacers that replace the series 80 leavers are much softer, so order extra to keep the sear from coming out of alignment.