Welcome to the board. My best guess knowing little about your weight or height or age:
Get one 12 gauge gun for ducks and sporting clays. Should weigh about 7-3/4 pounds plus or minus a 1/2 pound. I think 28 to 32 inch barrels would be fine. Merkel is a fine gun. Winchester Model 21s also can be found in this configuration. AYA Model 56s are also heavy enough and can shoot standard USA ammo.
For your quail hunting get 20 or 28 gauge, about 6 pounds. There are several gunmakers that make suitable guns for this - Merkel, AYA, Arrieta, Rizzini (3 different Rizzin companies that I know of) just to name a few.
Depending on if you are a NFL lineman or a professional jockey you may want to move the weights up or down.
Best,
Mike
Last edited by AmarilloMike; 02/02/08 06:29 PM.