Brittanys and Setters
A dog writer and humorist I enjoy goes by the pen name Spaulding Hoffhacker. He's a setter man and routinely blasts any dog that is not a setter. Because I first hunted over setters and have owned and flat loved them myself, I'm very partial to the breed. Sweetest dogs I know, best noses I've seen, hearts like lions in the field, and so damn beautiful to watch when they work.
But I have known some mighty fine Brits, too. And here in Colorado, where I live, you practically have to go to the town council and get a variance to get anything other than a Lab!
By the way, my previous setter who passed away in December, and I'm still grieving it--Deb's Whizbang Freckles out of the now gone Whizbang Kennels, and by way of Tekoa Mountain lines--would never fetch a paper or hold a gate for me. He was kind of selfish that way. Wonderful hunter, good friend, but his habit of correcting my grammar embarrassed me in front of my buddies!
I'm down to one bird dog, a very good orange Belton, Buddy, and we're planning to get and start training a new pup come spring. It will be another English setter.
Guess you know I'm saying that a dog man will usually become attached to a particular breed, and that's the end of that. No point arguing about it. They say you should never criticize a man's dog, pickup, or wife (in that order). I'd add--shotgun.
Started with a Savage single shot as a kid. Graduated to a Remington Model 11. Get teary eyed, still, thinking about either of them.
Hunted and shot clay targets with a Wingmaster 12 ga. for years. Loved it.
Switched to a Browning Citori Skeet for target work about 20 years ago. Still shoot it on targets.
And a few years ago got a couple of the the much debated, Turkish made, CZ SXS guns--a Bobwhite (English stock, double trigger) in 12 ga., and the Ringneck (Prince of Wales grip, single selective trigger) in 28 ga. In my experience, the CZs are great guns for the money.
I agree with a previous poster that the advantage of different chokes on a double does few hunters much good in the heat of a flush--but you can use them to advantage in certain situations. Set your selective trigger to fire the more open barrel first when you expect game to fly away from you, the tighter barrel to shoot first when you are shooting at incoming birds, for example. And many using double triggers do develop the ability to put their finger on the trigger for the appropriately choked barrel in the heat of the action. Having hunted a great deal now with both kinds of triggers on double guns, I can say I have come to prefer the double trigger for hunting.
I shoot targets with the O/U. Game with a SXS. Pheasant mostly with the 12; quail mostly with the 28. Grouse with whichever one I feel like grabbing on that particular day--usually the 28 because it kills birds quite well when used within its range and is so much more comfortable to carry in the mountains.
From the choices you offered, I'd suggest the 870 in 12 ga. for a first gun. Very versatile, bomb proof, and a tremendous value. Shoot a few thousand rounds, and as many birds over that Brittany as you can, and in a little while, you'll likely have more than one shotgun--and opinions as strong as the rest of us!
Love that pup, and know what a lucky man you are.