So many options out there, what's your budget? preference to single stage or two stage?
My favorite is a Geissele Hispeed DMR and I've tried few different ones. The single stage ones I've tried all have a bit of creep in them. It's only a small amount, but if you're used to a nice single stage bolt trigger you might be disappointed.
I'm trying out the new Trigger Tech AR trigger, so far so good. It's similar to the AR Gold trigger on that the first stage is extremely light and not noticeable and the whole pull weight is on the second stage. It basically feels like a single stage trigger. It has no creep, is and adjustable down to 2lbs