If you like the shotgun get it, you'll have fun with it so you don't need any more excuses
May be a bit harder to get 16 shells but over time you can acquire enough to shoot it whenever you want. 16ga is quite popular over here and absolutely no issue getting as much in any variety you want. I've only got one 16, it's a side by side with an 8x57 under it
(drilling). I picked up a Win 101 20ga o/u for upland, Waidmannsheil, Dom.
P.S. Popple -- I've got your big brother, a 12 sxs Suhl (DDR), double triggers, no chokes. Right after the wall fell got it new for 300-. Not the smoothest or prettiest but I don't hear of too many around either.