Shotgun Man,
A few observations to help you make your choice:
1) Physical recoil (kick) actually comes from the cartridge/shell itself and not the gun.
2) Lighter guns will recoil more given the same shell than heavier guns (easier to push a light object faster than a heavy object).
3) Gas operated autos do absorb some of the push and recoil less than O/U's or pumps of same weight.
4) FELT RECOIL is a combination of action type (see item 3), ammo fired, fit of stock, weight of gun, how you hold the gun, etc. Stock fit is more than just length of pull, drop at comb, and drop at heel. It also includes such things as shape of grip, thickness of grip, thickness of fore-end, stock surface (smooth, rough, etc.), thickness of comb, and who knows how many other small details. Another factor relating to felt recoil can be how much you like or dislike the gun. Guns that I like don't seem to recoil as much as guns that I dislike. I know, studied math and physics many years ago, but felt recoil is as much psychological as physical IMHO.
Good shooting and be safe.
LB
ps: I prefer O/U's but have heard good reports about Benelli and Browning auto shotguns.