-Larue makes some really nice stuff. I don't own one but I've shot one (one of the other brothers on the forum here owns one) and they're nothing but quality.
-Seekins. I, personally haven't handled any of their large frame AR equipment. Though I've built a couple rifles using their smaller frame (AR-15) lowers and parts.
-Wilson Combat is known for their quality in weapons in general. But again, I haven't handled any of their 308 platform AR's.
-Armalite. Well, being that I'm the "Armalite pusher" around here, I would tend to be a little biased in their direction. I've got one SASS that I absolutely love, and another that's waiting to be built (when I finally get the time).
-JP. I've heard nothing but good stuff about them, but we're back to me not personally handling any of them.
-Georgia precision. I've never heard a bad comment made about any of the rifles that they make. They make just about all of their stuff for extreme precision. Once again, never had a chance top play with any of their stuff though.
This is the AR-10 B SSASS, outfitted with a Nightforce Optic and an AAC suppressor. I've since swapped out the UBR stock for a PRS stock.