I'll make some suggestions that haven't appeared here for the most part.
Browning BSS or the equivalent Miroku 500. The Browning will be a single trigger, ejector gun; the Miroku a double trigger, extractor gun.
I'd also look at Bernardelli Gamecocks, the F.A.I.R. Iside (the only new gun on this list), later Fox Sterlingworths (the ones built after Savage acquired Fox), Ithaca NIDs, SKBs (the Japanese ones, not the Turkish ones) and Ugartchea boxlocks. All of these are built for modern U.S. ammo (something not true of older British guns). If you go German, the so-called guild guns are often very fairly priced, but be sure they have 2-3/4 inch chambers. Those with short chambers probably aren't up to a regular diet of U.S. factory ammo.
