Your prime consideration should be carrying weight (and balance, of course) and perfect fit. We don't know if you are a former linebacker or a current jockey - how can we recommend a specific gun for you?
We can tell you some basics about what works for pheasant and quail in terms of cartridges, choke and shot size.
But you need to tell us more about what you are looking for. Semi, pump, side by side, over/under, which do you like? Any action type will do the job perfectly well, and gauges 12, 16, 20 and even 28 can kill upland birds.
