Advice for regulator

I'm looking to add regulator to my Benjamin Maximus to get more consistent shots. I would like to try field target shooting with it.

So far I've seen two options, huma and altaros.

From what it looks like Altaros is easier to install and is cheaper.

Can any one recommend one other the other?

Also, one regulator is added can tube pressure be increased passed 2k PSI? Since there will be only regulated pressure pushing on the valve and valve screws are limiting factor for 2k PSI pressure.