You might also look at Franchi I-12. Nice guns and affordable.
I wouldn't hesitate to buy an older beretta 303. You can find new and used beretta 3901's on line or 391's.
There's only about a bajillion Remingtons out there for sale.
The only experience I have with Stoeger is a couple guys at our club being very disapointed with them. They both sold them at a significant loss. They have very poor resale value.
Like BigJim said, you can shoot clays with just about any good field gun.
NRA member, DCF&S member, PAFOA member, USPSA member, NSCA member