I would say first and foremost, find one that fits you. If you have been shooting autos, and are the least bit recoil conscious, the change will be noticeable (but not bad) if you target shoot (not that big of deal in a hunting situation, weight will be more noticeable than recoil then).

There are a number of good o/u out there. In addition to what has been mentioned Franchi, SKB, Browning, Winchester, Remington to name a few "middle priced" o/us. A couple "high end" priced o/us Krieghoff, Perazzi. Economy class Baikal, Stoeger, Huglu.

I had a winchester 101 years ago that was a good gun but it didn't fit me and pounded my check bone unmercifully. Again nothing wrong with the gun it just didn't fit. I ended up getting a Browning ( a bunch of them actually and I liked them all) that fit and the pounding went away.

Good Luck.