I put an AR Gold on my AR. It has a slight take up just like a high end 1911. Having a trigger feel similar across platforms is nice.
Several have mentioned the high cost of the AR Gold. Yes, true, it's crazy expensive. But what's more important than a good trigger? What's the first thing you do with a new gun? You aim it safely and feel the trigger, right?
The other triggers are probably good as well and I can't say the AR Gold is that much better. I just didn't want to install a trigger and always wish I had used something better.