I say, forget the moderator. Just use subsonic .22 Short HP when needed on vermin.
Get something nice with iron sights, that you can use as a companion to your centerfire for practice. Try to use similar scopes.
CZ is nice and really accurate.
Older, discontinued Browning A-Bolt 22 and Sako Finnfire are wonderful, full sized gems.
Ruger 77/22, same thing, if you can find one.
Ruger American today.
Marlin 39A is a full-sized man's .22 which will surprise you.
Browning BL-22 is a small lever rifle which is perfect for teaching a boy or girl to shoot.