20 g O/U or Auto is a great upland gun! You don't really need anything else. The Brownings and SKBs are nice and in your price range... a used Red Label is a pretty good value. I've been handling some of the autos lately... thinking of getting 1 for my daughter. Man, there are some really nice handling ones out there these days. If I remember, Berreta has one that I really like for about 800-900, I think.