From the guns you've listed, I'd go with the Citori. Why? Because all of your other shotguns are stick guns. For your early outings on the Skeet field, you'll want the simplest gun possible -- a hinge gun. I've shot my trap O/U on the Skeet field, it works OK and the trap chokes vaporize Skeet targets. For your first outing, your 32-inch barrels will work fine. Screw in some Skeet chokes for optimum results. I've seen new shooters have tons-o-fun with a single shot gun -- they just shoot singles at the doubles presentations.
Before you shoot, I hope you have a chance to observe some good shooters. See how they position themselves on the various stations and where they start their guns. With your 32-inch barrels, your hold point should be about a quarter to a third of the way from the window to the center stake.
For Skeet, you want a shorter barrel so the gun can accelerate quickly, but you want a longer barrel so it will swing smoothly -- obviously barrel length selection is a compromise. Of my Skeet guns I prefer the O/Us with 28-inch barrels. Big Jim likes longer barrels, but he's bigger than me and doesn't shoot with tubes. All of my Skeet O/Us have Briley old-school tube sets, and when I shoot with the tubes out (12-ga events) I use a barrel weight. Back in the 60s, my first Skeet O/U had 26-inch barrels and I was never able to run a 100-straight with it. Years later, I got some 28-inch O/Us and started shooting 100s. These days 30-inch Skeet guns are popular. I got a 30-inch O/U a while back; but, for me, the swing is a little slow for the Skeet field.
