I bought my dog from a guy who breeds Brittanys, Chocolate Labs, and Black Labs. He also raises pheasants.

My favorite spring break is a drive out to his place to go chase after some released pheasants with the dogs. ('course it doesn't hold a candle to the ruffies in the fall)
I'll admit right up front, you can hunt upland with any kind of a shotgun. And, I do. But, by far my favorites are the nicely balanced SXS's. They, indeed, represent the summit of the makers art. The craftsmanship that goes into those guns, and the ingenious designs (like Lefever's adjustable hingepin) is amazing. The evolution of the SXS has taken centuries. The best in terms of balance, durability and function have merged with truely fine wood and breathtaking metalwork and engraving.
I will probably never be able to afford a best quality gun, but there are scores of mid-grade guns that can be had for quite reasonable prices. (On the off chance that you don't know anything about SXS's and you're thinking about grabbing a cheap used one, I encourage you to do just that. But, before you do, post the make and model and any particulars on this site, so you can get some advice about matters such as chamber length, nitro proofing, and aftermarket modifications.

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I guess I should put my money where my mouth is and admit - most of my modest collection is SXS's.
SS