Jim, continue doing exactly what you have begun: ask questions. And remember, the only "stupid" question is the one you don't ask. The answer to your question will prove to be elusive but patience and study will pay huge dividends. Share your questions here and you'll find the members here to be a motherlode of knowledge. And when you begin to focus in on something specific ask the board for comments.
You are correct in saying the integrity of the barrel is most important. Almost everything else can be fixed but a bad barrel cannot (usually). The great bulk of hammer guns have welded damascus barrels, which a lot of us love. But they have to be treated with respect and fed proper ammunition. Even most vintage steel barreled guns require the same caution. There are a few modern made hammer guns, such as what V. Bernadelli made that will digest any of today's off the shelf ammo. So, first thing you should decide is are you interested in older vintage guns or modern. Decide this and then begin your study and research.
Welcome.....and good luck!
