Roost em, Do you get a sore neck when you turn those barrels vertical to shoot? In all reality both guns are very good! It is the feel of the gun in your hands that will set your mind. I have both O/Us and SXS, but I feel right with my O/U in my hands. But there are two kinds of O/Us, high profile and low profile, the profile is set by the lock style. The old Brownings are of the high profile style, I can't shoot them. I shoot low profile guns and I have 3, SKB 505 20ga 26" tubes, SKB 585 20ga 28" tubes and a Ruger red label 28ga 28" tubes. The barrel length makes the gun feel different also. I would shoot all the guns you can get your hands on and find out which you like best.
Roost em, my SXS is an old Ithica 12ga, it belonged to my Great Grandfather. My uncle broke the stock, so I had to fix it, it is still ugly but it shoots well. It is very fun to shoot at the range, but it is really heavy, so I don't think I will hunt with it a lot.
Gselkhunter