Very simple answer - an AyA No 3 or No 4- their Boxlock ejector or non ejector.

Very solid and well made guns, will last several lifetimes and shoot very well. Nice and light even in a twelve and if you stick with 1oz of 1 1/16 oz cartridges recoil is still minimal.

If you want more Pistol Grip / Beavertail then look for the AyA Matador.

As a 2nd hand buy they should be very good. In the UK you are paying £800 for a still tight limited used one, £200 to £400 for a well used but in good condition. Add though another £200 to that figure for a 20 bore.