Start searching the forums here and elsewhere, I've seen several forums here about chess sets and dealers. I'm pretty sure Jaques of London and House of Staunton are both reputable dealers, not to imply anyone else isn't. Just to begin scratching the surface here, see
http://blog.chess.com/NimzoRoy/nimzoroy-and-chess-set
www.cln.org/searching_faqs.html
Some boneheads get insulted by the last link, I hope you're not one of them and it proves helpful GOOD LUCK!
I'm looking into purchasing a good quality portable chess set. What's the verdict on Jaques of London versus House of Staunton versus Mark of Westminster? Are there any other makes I should consider? I'm looking for something portable, so king height 2.5-3.75 is preferred, as are folding boards with storage compartment(s) for the pieces. I've also seen sets from an online shop, Chess Bazaar, which look just as nice as any of the others mentioned, but at a fraction of the price. Has anyone had experience with Chess Bazaar?