Cordoba & Montefeltro are also nice options to take a look at. I have shot lots of rounds through both of these guns and they cycle the lighter loads.
I personally shoot the SBEII and purchased a new 25th anniversary model in Sept.
I did pick up a Vinci, but didn't like shooting it. After about a 1,000 rounds through it, I sold it and went back to my SBEII. I also have a M2 which I enjoy shooting as well. Virtually the same as the SBEII until you try to take it apart. Slightly different and only a 3" gun.
If you are after the 20 gauge, don't over look a SX3. I picked up one of those for shooting crows and pigeons. I love shooting it and it is a light gun. I probably have close to 2,500 rounds through it and no issues.