that's what I do with my .870 12 gauge .sometimes upland game ,sometimes my slug gun for deer.Ithica Featherlight Pump 12ga...Lightwieght and plenty of gun(pump).
Great for waterfowl also in the 2 3/4-3"
Change barrels and you have a slug gun for Deer.
I really love those English style straight stocks. One of these days, if I can find one, I'll buy a Citori in that style.My favorite pheasant gun is my Auto 5 Sweet Sixteen. Very light to carry, and the light recoil lets me get on follow up shots quickly. Runners up would be my 16ga model 12 with an English stock, tied with my 1950 20ga Browning Superposed, which is usually what my wife is carrying. They all have mod chokes. Superposed is improved/mod.
I'm 5' 8" and 155lbs and very strong for my size. I really like the CZ O/U they feel good to me.I'm sorta a shotgun nut. How big a guy are you? Whats the budget? How strong? Really, Browning O/U seem to fit the XL & XXL guys over 6 feet better than the Beretta's as the Beretta seem to typically fit the 5' 10" and down large and medium in O/U. O/U 30 inch barrels if you are over 5 foot 11. However, I really think for pheasant hunting a 28inch barrel Semi is the way to go unless you are a smaller guy then go with the 26in barrel. I like the Beretta semis gas over the interia benelli. 12 or 20 doesn't matter but I think I would go with a 12. A friend has the orien you mentioned and loves it.