I have 26" 20ga Montefelltro and a 20ga 870 Youth. I consider both to be the best gun for their intended use.
The 870 is my rabbit gun. The short 20" barrel is handy for walking timber, climbing steep hills, kicking brush piles, and following a beagle thru to briars. It's a Winter gun and sees the worst the upper Midwest has to offer - a lot of snow and mud. The short stock makes for a perfect fit when I'm wearing heavy winter clothing. Though the 870 is fairly light it's perceptively heavier than the Benelli and mostly rides slinged on my shoulder. I don't shoot it much, but when it goes "bang" is usually brings home the bunny.
The Montefelltro is my pheasant gun. It's lighter and I carry it in my hands for snap shooting. It's a Fall gun, we cover a lot of miles but it see mostly fair weather. The Montefelltro is somewhat "show offy" and unique, befitting a pheasant gun which, for me, is a more social sport. I shoot and practice with the Montefelltro a whole lot more and love it dearly. There are a lot of good semi autos out there but IMHO the Montefelltro is the best.
I've handled Franchi but never shot one. They're light, almost bordering on flimsy. The Montefelltro is as light, if not lighter, and seems very robust and solid. A couple of friends from Kansas had some back in the 80's (Model 48s IIRC) and were less than satisfied, they worked great for 3 or 4 seasons but then cycling problems developed. Maybe it was due to poor maintenance or scarcity of spare parts at the time, I dunno. A Beretta 391 would be my first pick after Benelli. -- Kernel