Mods, if this isn't the right place, please move at your discretion
So, I'll be in New York in the beginning of September. A whole week with the better half

. I was wondering if (and where) there would be some nice guitar shops - I know about
Sam Ash, Manny's, GC and the likes, but since I will be on the lookout for older RGs (500-700 series), maybe smaller / second hand stores would be my best bet.
Also, is 48th Street really worth its salt ? Everybody's always talking about Denmark Street in London, but I am very familiar with that area and there are maybe 7 stores at most (all with horrible service and prices) !
As always, thanks a lot for the replies !