The Geissele SD-E. Two stage, flat trigger, no adjustment screws to tinker with, around a 1.2 lb second stage, sharp break, works wonderfully for precision or 3gun. The flat trigger makes it feel lighter than it really is.
The SSA-E is the same but has a traditional curved trigger.
I've tried pretty much all the AR triggers on the market. I like two stage rifle triggers best. I shoot a lot of 3gun, so that is what they get used for.
Thanks Boomfab for elaborating a bit more, the new trigger design imo has a major influence on the feel of these new Super Dynamic series triggers.
Sumpter Steve....let us know how you like the SDE if you have the time, I got a thread on here somewhere about the SD-E.