Scope Recommendations

New to air rifles and this forum.

I have two Gamo rifles, Raptor Whisper .177 (4x32) and Hornet Maxxim .22 (3x9x40), both came with Gamo Scopes. Would like to upgrade the glass.

Don't know anything about air gun scope brands/quality. My muzzleloaders have Nikon, Vortex and Leupolds on them.

Looking at UTG Bug Buster Mil Dot. I'm open to any suggestions. Looking to spend up to around $150/scope.

Many thanks,

Paul