SKB 505 O/U in 20, 26" barrels. Plain-jane version, no gold pheasants on the side; a real good field gun for about a grand NIB.
http://www.skbshotguns.com/
If you hunt quail in country like I do, I think you'll like it.
Not dirt cheap, but worth every penny and built every bit as well as a Citori, without the bulk and for about $500 less. (I've got a 500 that's 30 years old and it locks up like new. Greener system works well and is durable. Old ones are branded Ithaca SKB; new ones are available as SKB or Weatherby). Assuming it fits you, you won't wish you had the money back to spend on something better.
We have a 3-shot limit here, and just about any nearby state, so no 8-round magazines for quail. A pump gun is a good choice because it's cheap so you can afford to trash it, but it's usually not fast enough to give you an accurate 2nd shot in the boulders and brush where you have a split second to hit your quail before it's gone. A semiauto gives you 1 extra shot over a 2-barrel, but 1 fewer choke, so you lose what you gain, and both pumps and semis are a lot longer than break-actions -- not great when you go through the nasty brush that's everywhere. Most of the time, I get don't get to use the 3rd shot anyway; the bird is either shot, or it's gone, by 2.
I'd skip the SxS, unless you're really looking for an excuse to buy a cheap one or something, or unless you really want to use a coach gun. Coach gun may be good for quail popping up, but not much else.
The little O/U I mentioned above is a helluva dove killer, too, and can be used for skeet, pheasant, chukar, etc., so it's good for more than a coach gun. I'm not the only one who thinks so; I hunt with a guy who's a couple decades older, is a crack shot, and has an ample gun budget and rooms full of mounts and guns, including a LOT of SxS shotguns. He
could shoot whatever he wants. He has 4 of the SKB's, one with an extra set of 28 Gauge barrels, and one a high-grade Weatherby version in 12, and if he goes upland hunting, he takes one of the SKB's, usually in 20. Quick to the shoulder, but also swings well.
Note that we're in your general area and probably hunt in similar conditions.