I used a Remington 870 Express for about three years, loved it, but it started screwing up on 3" loads. Sometimes it would eject the spent shell and fail to grab the next one from the magazine. Sometimes it would fail to eject the spent shell and grab another one from the magazine and try to stuff both. Or it would just put the spent shell back in the chamber and leave me wondering what happened. I took it to a gun smith about three times before the manager apologized for wasting my time and replaced basically everything but the stock and barrel. Worked great for another three years, and back to the same problem.
I got my SuperNova a year ago, and haven't looked back yet. Fewer parts, easier to clean, and hasn't missed a beat yet for turkey, geese, ducks, woodcock, grouse, snowshoe hare, squirrel, skeet, sporting clays, trap, you name it!
If you had an old hand-me-down 870, you're set. Otherwise I'd recommend the Benelli hands down.
Happy Shooting!