I have a Remington 870, nothing special. But, that’s what I like. I got it for $400 brand new and it is super solid. 6+1 for 3″ shells and I can squeeze 7+1 with 2 3/4″ shells. It is super solid and never lets me down, is easy as can be to operate and maintain, and best of all looks scary as hell.
My father has a Mossberg 500. Same as the 870 but with one less shell capacity.
You really cannot go wrong with a Moss. 500 or a Rem. 870 regardless of variant. They all have plenty of aftermarket accessories, too.