I've looked in stores and like the Blancpain Villeret Moonphase 6263-1127A-55.
http://www.blancpain.ch/e/collection.../6263_1127a_55
I went to a couple of stores and it is about $11,000 but online, you can find it readily for about $7,000. Some are not authorized dealers and there would be no warranty but there are enough places out there that service watches.
I know people say that if you're spending that kind of money, you might as well get it from a reputable store but $4000 is still $4000 and I can get another Breitling or Submariner for about the difference.
Anyone out there who has bought a watch from an online retailer?