Pwiz,
The AR-15 Jewel trigger has set the standards at which all other AR triggers are judged. This is due to the fact that the Jewel trigger is fully adjustable, and can be reset at will to any given persons ideal of what a Semi auto match rifle should be in regards to perfection.
If your looking for a match trigger, then you will hard pressed to find a better trigger that is a drop in, and owner tunable.
The only real down fall to the trigger has little to do with match shooting, but more to duty use of the rifle. The trigger can be tuned to the point of borderline reliability (read light as hell). With a trigger set this light, the slightest bump on the trigger will set the rifle off.
Bottom line is if your rifle is used for match/target shooting, spend the $175 and never look back.
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As for my person choice of triggers, I prefer a Single stage trigger. But, the difference between you/I is that I don't mind spending a few hours every thousand rounds resetting a worked over stock trigger group, and have the tools and time to do so when needed. Also, it helps to have a few extra match/target rifles colleting dust in the safe, and available when a trigger/FCG does go south and needs to be reset.
If you have only the single rifle, run with the Jewel trigger. It can reset in as little as a minute in the field if when it goes out to tune. Plus, when you do start to shoot matches, the weight turned up on the spot if you every fail a DCM trigger pull test.