I've been watching for a straight-stocked Beretta for quite some time - precisely because there were double trigger models. Finding both on one gun is challenging. For my own purposes, a 20 ga would be best, as weight of kit becomes more of a factor with age.
With models and configurations imported into North America controlled by the importer, finding one configured to my needs is all but a pipe dream.
Last year, I stumbled upon a 20 ga Savage Fox A Grade that satisfies all the criteria (including choke tubes and steel friendly). It was a pleasure to carry and shoot, and made for an exceptionally successful season.
This encouraged me to seek the same kind of results with a similarly configured U/O. However, these are virtually not available, except as a bespoke purchase. No cash for a custom gun at the moment, so I snagged a used 20 ga Rizzini Light Luxe. I took it out on opening day and never got to fire a shot. I can't say if the pistol grip/single trigger and I will get along in the field. I tore a tendon in my ankle, so I'm going to have to wait a few weeks before I can try again.
My competition gun is a Beretta 682 Gold Trap. A pistol grip, single trigger just makes sense in competition. But, in the field, I've always preferred double guns.