We looked at antique malls, furniture stores in our area, and lol after a lot of searching decided to just get our existing set refinished and chairs re-upholstered. Our initial set was second hand antique, but just wasn't in the pristine condition that it was in when we originally purchased it. As we sent ours out for this vs. doing any of the work ourselves, it really wasn't that much less expensive than getting something new, but it was the chair comfort and perfect fit of the existing set that got us to stick with what we had. We looked at three furniture stores, two antique malls, and one place that specialized in refinished high quality furniture.// I didn't know this till I started looking, but found I was more a fan of the older stuff than the new. Seems more solid. I think, though, much of this is going to be your decorating style and taste / what looks good in your home and what works for you. // A big reason we were considering a new set too, is that we really only had four chairs that were part of the set and three additional chairs that were purchased separately. I was originally looking for six matching chairs. With the refinishing though, we have the side chairs stained to match the original set and the seats upholstered the same way, making them blend in quite well. It's a compromise to have this vs. complete matching, but I found the comfort and quality of the four chairs just so good I didn't want to part with my set.
Our initial set was one we bought second hand from the little old lady we bought our house from. She was moving into a smaller retirement apartment and asked if we'd be interested in purchasing her set as she was downsizing and it wasn't going to fit into her new place. She must have only used it for rare family gatherings, etc. as it was in pristine shape, no scratches or anything when we first got it. We use it daily for dining -- no eat in kitchen, daily for homework, fairly often for playing cards, etc. and that means that the chairs especially periodically (every 10 years or so -- need refinishing and re-upholstering.)