Good HiFi stores in NY, Washington DC area


Hi, I'm looking for recommendations for good HiFi stores in NY, NJ, Philadelphia, Delaware, Maryland and DC metro area. I'm looking to buy good condition pair of used/demo Speakers (for Pass XA 30.5). I've shortlisted wide range of brands (coincident, silverline, Von Schweikert, clearwave, DeVore, Tannoy, Proac) etc. or any other suggestions please... My priority is to listen to...

Coincident (Super Eclipse, Super Victory)
Silverline (LaFolia, Sonata III)
VS (DB 99)
DeVore (9s, O/93)

I can travel out of my way for the above models. I plan to audition and buy speaker during my short USA trip in July 2016. Thanks
kartikeyp
In the DC area. . . .DejaVu Audio (dejavu-audio.com) and CommandPerformanceAV (commandav.com). Both in Virginia.
I second Deja Vu Audio a great store and they do have Proac which is on your list, not to mention lots of other great gear. They are in Mclean VA about 15-20 mins outside DC.
David Lewis Audio in Philadelphia.

I have never seen so much high end equipment in my life.

Amazing!

Well worth  the trip.