The Spartan SPR220 is my most versatile go to shotgun for most stuff from dove hunting to utility. I've shot a squirrel, a deer, and a duck with this shotgun just in the last few days while out back doing chores.
I LOVE this gun for dove hunting, but I'm quite used to it. It's a coach gun, a bit whippy. Purely for hunting, they did offer a 28" gun, but I love the little coach gun for what i need, short and handy, quick to the shoulder. it makes a great combination gun, too.
I was sneaking up on the tank to see if there were any ducks on it when I saw this bad boy. I had a 3" magnum 4 steel in the I/C barrel and a 3 buck in the mod. I usually load 3 buck in the gun for big stuff as I don't wish to screw up and pull the wrong trigger and send a slug skyward. The 3 buck did the job with a head hit, though.
I bought this gun in 20 gauge for its light weight, 12s are heavier. This thing is maybe a bit over 5 pounds. I don't think a 12 gauge slug would be very nice to fire from such a gun.
I bought the Spartan about 6 years back, I guess, for $299 and tax. It ain't that pretty, but it shoots where I look (after shimming the stock as much as I could to get a little more drop and get the cant out, I'm a lefty) and this thing is rugged, will last me my lifetime even though it gets carried nearly every day and gets a lot of rounds through it during dove season. Much is mentioned on here about the round counts a serious clays shooter fires, but even when I've shot clays, I've not fired that much as I can't find a recipe for a clay pigeon. Doesn't sound like you're wanting a serious clays gun, though.
For what I do with it, I love this gun.