First I would say NO to adjustable gas on a SBR.

If you have to have one, you might look at the Noveske switchblock as it is rugged and designed for what you are doing with it. After that, MicroMOA has one where you can change out the throttling plates. It is more durable, kind of rebuildable and is what I would choose if I were building a carbine length adjustable gas system.

Adjustable GBs were originally designed for low mass systems with rifle length gas. When you double the pressure on a short gas system, none of the ones you have listed will last long term and most will leak and come out of how you set them in a few thousand rounds or less.