Re: Benelli 20 guage slug guns
The Benellis are great but expensive, the Browning Gold is also great and expensive.
I own two Remington 11-87s (20ga & 12ga) both are set up the same with the rifle/cantilever barrel both wearing Leupold VX-II 3-9x40 scope, and both shoot excellent, the 20ga likes the Remington AccuTip 3", the 12ga likes the Lightfield EXP 2-3/4", I do want to try the 2-3/4" Accutips in the 12ga.
If you want a dedicated slug gun I would opt for the Savage 220f or the H&R Ultra Deluxe both in 20ga. I own both, they both have the same scope as my 11-87s and they both shoot the 3" Accutips. The Savage has a slight edge, reason would be it handles like a rifle, great trigger, balances better, and at the 200 yrd mark it out shoots the H&R but within 150 yd mark the Savage has a slight edge.
Today's slugs in 20ga are excellent and will take down deer/bear size game without issues, no need to experience the recoil of the 12ga