I love me some 20ga.
Before you listen to people spout their favorite flavor, just know the fit of shotguns has everything to do with your likelihood of success hitting something.
They all feel different and I guarantee you if I was blindfolded and you handed me a Browning O/U and a Beretta O/U, I could tell the difference immediately.
Browning just fits me better.
I carry a 3" 20ga Browning Citori Gran Lighning in the field, which replaced my Browning Silver Hunter.
I love them both...The Silver Hunter (gas auto) is light, quick with a 28"barrel, and reliable. I have no plans to ever get rid of it.
The Citori Gran Lightning is beautiful (I'm a sucker for amazing Walnut), it's nice to be able to shoot two different chokes especially on the SC field, and it's reasonably light for carry.
I have been on the sporting clays field when my friends with their super-amazing $2000 inertia guns were bumming ammo from other people because their shotty wouldn't cycle the light loads.
Go try different shotguns on for size and fit and then pick the one you like.
A beautiful O/U AND a nice gas auto are the choices I made.