550 OTD for that GI is excellent.
For some reason they went up in price and were barely being had for $599 on the shelf. That 550 is a lot closer to what they should be, 469-499 on the shelf.
Anyhow, great 1911 you have. It'll shoot the lights out as it is. Or you can upgrade it as you see fit.
Monica. You need to sell this feller a holster for that weapon.
Got one of these myself and it's a great shooter. I'm not sure what the trigger pull is but feels like almost 4 lbs. Next one I want is either the Colt New Agent or Defender..... then a Commander..... Or maybe the Commander first and then the little ones.