The more money they cost, the better they are. Pick the most expensive one and you'll have the best, simple.
I have hunted with guys with Benellis and Stoegers (which I think use the same inertia system?) and have seen the famous "Benelli click." No matter what you get, if you don't learn to use it properly, it is useless.
I went through a lot of soulsearching when I wanted a new shotgun last winter. Really wanted a 10 gauge Browning Gold but couldn't justify the expensive shells. Really wanted a Mossberg 935 but heard too many stories about bum bolt buffers. So I bought a Baikal MP-153. My reasoning? It has a satisfaction rate that's at least as good as the more expensive B guns, from what I can find, but costs a half or a third. It also fires all shells flawlessly, from 2 3/4 to 3 1/2. That means I can take the hundreds of bucks I saved and put it into practice, and become a much better shot, which is what I've done this year.
The insides of the gun are made from stainless steel. It's super simple to take apart. It's not a flashy gun (the checkering looks like they did it with a butter knife), but I don't tend to notice the checkering on my gun when it's 6:30 a.m. on a coastal creek with wet flurries blowing down my neck, the sun in my eyes, a leak in my waders and wings whistling overhead. Or when I'm falling off a cliff because I slipped on some rockweed while stalking black ducks in twenty below zero. However, I realize flashy guns are very important to some people, particularly if you don't hunt often enough or hard enough to beat a gun up.
The only two downsides I have found are
1) Extra-full steel chokes combined with T shot are a bad idea, as the Truchoke system isn't up to it. Not a huge issue, but I'd hoped to get some T and try it on sea ducks this year.
2) The barrel finish sucks, and the stock isn't great either (I have the wood stock). The wood stock is super easy to refinish; I expect I will send the barrel and reciever away to get duracoated or something. That's an added expense, but I still have come out wayyyyy ahead in the savings.
It's your money, so make your own choice. Expensive guns are nice, and maybe my Baikal will prove to be a lemon in the long run. But in general, I think most guys would kill way more ducks if they asked themselves "How do I make myself a better shot?" instead of "What's the best semi?" If you sink a few hundred bucks into the range, you'll ultimately become a lot happier with whatever gun you pick, I suspect ...
Maybe you know all this already and I'm preaching to the choire

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