Planning audio audition trip to NY/NJ, vendors???

I am planning on burning some winter blues by jumping in the car, leaving NE Ohio and traveling east to Philly, north NJ or NYC to audition some audio gear. I'm looking for everything, CDP's, speakers, amps, etc., for various room sizes, future upgrading, and general audio knowledge/experience etc. I'm looking for your help on some good retailers to visit in these areas, hopefully some vendors that I could have a buying relationship with in the future. Would appreciate your positive experiences.