I like Benelli shotguns, but never use them for clay shooting. To me, they are best for land-based shooting (not air-based). (Too heavy and bulky for air-based shooting.)
Having a lighter, easier-to-swing around as needed, shotgun makes more sense (to me) for air-based shooting. That, and the lower recoil, are the main reasons I choose a 20 gauge for sporting clay.
You may want to consider the Remington 870 Express (can be had in 12 gauge, 20 gauge, and/or maybe even .410), shotgun. You might find them at Walmart for under $300. And, they have a Youth model available (which I what I use, though I have to be careful how I hold it to avoid it slamming against my hand when I shoot it).