"Watch Guy" Destinations in NYC?

[blockbuster]

I will be visiting NYC in a few weeks.

I plan to go to the PP boutique, which I understand is inside the Tiffany store on 5th Ave.

I think there are some other watch brand boutiques on Madison Ave. (e.g. Girard Perregaux at 701 Madison Ave.).

And, I will of course visit Tourneau.

But, can anyone suggest some other watch guy destinations? Other top brand boutiques? Any interesting dealers of new and used complicated and rare watches?

Any suggestions would be appreciated!