I can't recommend the SBE for upland. 2 3/4" shells are king here so, why buy a gun that will more than likely have problems cycling them? If you must have a Benelli look at the M1 or better yet the Montefeltro. Which Beretta 391 are you asking about? AL391 (Tenkey or Urika) or A391 (Xtrema)? Again, I won't recommend any 3 1/2" gun (Xtrema) for upland. The AL391, M1, and Monte are close in weight, performance, and cost. Of these three I would go with the Monte. It's slightly lighter and much thinner than the other two.
Others worth consideration are the Browning "Fusion and Evolve". Both are very light and extremely reliable. Both are gas operated and have a lot of features.
Franchi also has two models that are very good for upland. The AL 48 and 612/620. The 612 is a 12 gauge and the 620 is a 20 gauge. They are almost as light as the Brownings but cost $200.00-$300.00 less. The AL 48 is all I use for pheasants. It's very light and slim. It handels more like an over/under than a semi-auto. They are not made in 12 gauge anymore but can be found as left overs in shops. They can also be found on the used market and even sometimes NIB.