ASW has a good watch forum. Or at least they did 2-3 years ago.
http://www.asmallworld.net/
Here's a good place in NYC. Not sure if they have any Hublots.
http://www.midtownartsandantiques.com/
If you're ever in the city, you can also check out all the shops in the Diamond District on 47th between 5th and 6th.