If you are not wanting to spend $1500 on a shotgun, look into the stoeger condor. Not saying its in the same class as a browning or beretta, but it will do what you need it to do. They are a little heavier, not nearly as pretty, and they don't have the trigger selector. They do take mossberg chokes which makes the chokes inexpensive and easy to find and they will hold up. I duck hunted with a 12 ga model in slop for many years and never had a malfunction.
A field grade Browning Citori certainly will last you a lifetime. I just acquired a CZ Wingshooter Deluxe (not made any longer). I did quite a bit of research on the internet, reading folks opinions, and I found that the CZ O/Us made by Hugulu (sp?) are very highly though of. Mine is a really nice feeling/swinging shotgun and appears to be very well put together. I'd be pretty sure you can get into one of these for less $$$ than a Citori. Just my $0.02 worth.
I've got Citoris, Beretta's of several models, and a Franchi.
I personally don't like the Citori's,they're heavy clunky and not the sleek weapon the beretta or franchi are. I really like the beretta models I carry, but my new favorite is a Franchi Instinct SL 20 gauge with a 26" barrel. It's ultra light weight, silky smooth and a killing machine. It doesn't have the style of the others but it also doesn't have the price tag. It's an outstanding gun for what you're doing. I primarily shoot doves, grouse, and a few pen raised quail with it.