I like this one for two reasons.
https://www.rainierarms.com/?page=shop%2Fmanufacturer&manufacturer=180
First, it is adjusted from the front with supplied long allen keys. I had a JP that was adjusted from the side and was a real pain to fit the allen key in to make an adjustment.
Second, it has a plunger that locks your setting in place without worrying about locktite hopefully keeping your adjustment. You simply push the plunger and turn the adjustment knob and it will lock your setting. The adjustments are a quarter turn which is fine. Easy to get to on a Mid or rifle length gas system.
Oh, it has a decent price too, which is nice.