I am currently running a moderated .22 FX Dreamliner Tactical with a Vortex 1-8x24 FFP.
It is set at 950 fps with the pellets I am using. It is a bit louder than I care for, I may try a different moderator but then I have to go back through tuning the rifle to it which is time consuming.
It was not a cheap setup but I will tell you, it is an absolute laser.
Be careful though- good air guns can be a rabbit hole that runs deep.