Ok, I'll weigh in. During the last 4 years I have bought a lot of guns. My position changed a bit and I was no longer traveling the world all of the time and I had a bit of "extra" money and a lot of pent up desire for shooting sports.
I have a 70's era Remington Wingmaster, 20 ga that I love. But I wanted to explore the realm of auto loaders. I first bought a beautiful used Remington 11-87 Premier. It fit me and I shot it well. Problem was I could never get it to cycle reliably. I then bought a Stoeger M2000. Now lots of folks will deride the Stoeger, but I and many others have found it to be a very reliable shotgun. For the $399.00 I spent for it at Dick's I have no complaints whatsoever. I did have to shorten the stock, due to the LOP being too long, but other than that it has been great.
Next, I had a buddy call me from a gun store one afternoon and told me that they had a nice A390 for $450.00. Twenty minutes later, it was mine. This is my favorite of the 11 shotguns I now own. I have put thousands of rounds through it at skeet and sporting clays and have had no issues of any kind.
Finally, I found a Beretta AL390 (the "Walmart" gun) at Bass Pro Shops for $549.00. I marched in with my 11-87 Premier, added $250.00 and walked out with one. It is my hunting gun. Same boring reliability as the A390, but with synthetic stock so I don't have to worry about messing up the pretty wood in the Dove fields.
I have seen the same guns at Cabelas too. So, in my simple minded opinion for ~$560.00 or so, the Beretta AL390 is one of the best shotgun values available.
For a totally budget driven decision the Stoeger M2000 won't let you down either.
I know if I like the Stoeger so much, why get the 390's? For high volume shooting, such as clay sports, and dove hunting (when you are lucky), it does smack just a bit harder than the gas driven Berettas.
My two cents worth.