I'm considering selling my Vinci to get a VersaMax, SX3, or some other option. I know this is like asking what bow should I buy, but humor me a little with your take on a quality waterfowl gun that will shoot 3.5s.
I love the Maxus....I like the feel of the a400 too. Funny thing is I shoot my 870 express more than o do my autoloader.
smart man.....i also did this and i also spent the extra money on better shells with heavier shot(tungsten, heavy steel and a duplex load federal used to sell) and it made a difference. i actually saved money per bird..i never felt the need for a 3.5 inch and actually my 3 inch patterened better than my brother 3.5 with the same shell. my 10 gauge actually patterns better than both of them. it is my personal belief that the longer shot column is harder to pattern...no imperical data just what i noticedIf the only reason to change is for the 3.5 capability you might want to try a better shell choke combo that might get 3.5 results.