Shotgun Recommendations

[JimmyHoffa]

Since you mentioned waterfowl, I would look at 12 gauge.  It is an all around shotgun load with many, many different shells available. 
As for specific guns, I like autos--Benelli and Browning.  The Browning A-5 has a gas ring that changes the recoil cycle depending on heavy vs. light loads to eat up recoil.  Can usually find good deals on them.

[uplandhunter870]

No one in there right mind shoots 3" magnum loads to shoot trap or skeet regardless of whether they are shooting a pump, s-auto or double gun.  If you are more than 130 pounds you will care less about recoil in a trap, sporting clay or skeet gun.  If it was a big deal no one would shoot double guns for clays.

no one shoots 3" shells for trap and skeet because they are illegal, trust me if people could shoot 3'' 1 1/2 oz loads they would, i know i would especially at major events