I to will give a nod for the H&R/NEF Turkey shotgun. Nice gun, shoots great and is light. They even have it in 3 1/2" mag & 10 guage if your a brave man <img src=icon_smile_big.gif border=0 align=middle> here's their link in case you want to see them....
http://www.hr1871.com
You can also buy extra barrels for these guns in differn't calibers and guages for about $70.00 a piece though you will have to send the frame in to it fitted properly.
Another good option and one i'm working on right now is a Thompson Center Encore.
http://www.tcarms.com
Their encore is now available in a turkey 12 guage version or you can buy the barrel if you already own one. The turkey barrel comes with a screw in choke and hi-viz sights with complete camo. These are great guns and you can buy about 500 differn't calibers and guages for this gun. You can buy the barrels from various retailers and custom shops without having to send the frame back. Thompson Center barrels can be found for about $199-$229 and the custom barrels run in the $350 neighbor hood. Good luck to ya' and let us know what you come up with... Scott
Tick a Liberal Off, Buy a Hand Gun!
http://tscott.fws1.com
ONE NATION UNDER GOD!