I, too, would like to get my hands on a V3. Cabela's has them on their site, but haven't seen any in store. Other stores that were expecting to have them in July are now being told possibly September by Remington. Randy Wakeman speaks highly of the V3.
As for which one to get...do you want a 3" gun with no frills or do you want a 3.5" gun with more bells and whistles? In between? Look at the Versa Max Sportsman, can be had for $900 or less but less features than the VM/VM Waterfowl.
Despite what some people think of Beretta, they do know a thing or two about Shotguns.The A400 is a little expensive, but look into the A300 Xtrema for a 3.5" gun in the $1,000 or less range or the A300 Outlander for a 3" gun in the $650-800 range depending on finishes and what not.