I own the A400 Xtreme Unico and absolutely LOVE IT! It cycles everything I give it and the recoil reduction is as advertised. I've hunted pheasant, quail, chukar, and turkey so far, as well as spent time at the range and I've not had a single failure. It cycles extremely fast and recoils straight back so that you are back on target faster.
I have a buddy that bought a Super Vinci and in spite of it's excellent reputation, it failed to cycle from the moment he took it out of the box. I want to say that I think this is one of those rare exceptions, because the ARGO system has a great reputation, but it did give me pause to recommend Benelli.
Every time I hunt or spend time at the range, people drool over my A400.
If you go with the Beretta you will absolutely not be disappointed.
Soli Deo Gloria
Only one life, 'twill soon be past. Only what's done for Christ will last.