I have a Remington 11-87 in 20 ga - Ducks Unlimited
The Negative IMHO: I don't like the positon of the bolt release or how it must be nicked to feed the shells. The gas system is kinda primitive for the 21st cenury. (3 piece piston n rubber "O" ring.)
Positive: Approx 1/3 the cost of Benelli auto. Million & one aftermarket options to include fully adj. competition ready stocks. I have fired her alot n cleaned less than I care to admit. Gas system can be opened to accomodate really light loads if necessary. ( I am referring to extremely light skeet reloads )
The Benelli - Can't run light loads and I'm not sure there is anything you can do about it. However, it is very reliable and has fewer moving parts which is more important to hunters. IMHO - the Benelli has superior ergos but that's a personal preference. (Very slender forearm - no gas system)
I had an older Browning - recoil operated. I read a review on the new A5 vs other current autos - the A5 had the worst recoil.
If you can afford it - my vote is Benelli.