If you live in the Boston area, Tourneau at Copley is a great place to buy/find/look at watches. The experience is great, the salesmen/women are knowledgable and personable. On my last visit, Paul Costa, one of the salesmen, was kind enough to introduce me to their watchmaker/technician. He also gave me a few other books and magazines to peruse. They carry Panerai, Cartier, Omega, Longines, Breguet, Patek Philippe, Rolex, Tag Heuer, Tudor, and IWC. I think that's it, at least. This is not a sponsored post, just my experience. To prove it: their prices might not be the best around, and since they don't negotiate anymore (as of May 2014, I believe, it might be 2013), their price is what you will end up spending. Their other location in the Burlington Mall carries mid-sector brands such as Hamilton, Movado, Oris, etc. The salesmen are also very personable there (I bought my father a Movado there). Check it out if you have time. Also in Copley, the Montblanc boutique, who actually makes some nice watches.
Jake Fogarty is the founder and writer for most of what you will read here. If you want to contact me you can visit the contact and advertising page.