Earphones / Headphones: Where to try, what to buy?

Thought this would interest a a few here... Grado "factory" tour, so to speak. They're based in a Brooklyn townhouse.

http://arstechnica.com/gadgets/2014/07/some-of-the-worlds-most-reknowned-headphones-built-in-a-brooklyn-townhouse/

The company does all the injection molding of the plastic parts for its headphones in the basement with two machines, one old and one modern. The machines also still churn out parts for turntable cartridges, of which Grado shipped half a million per year in vinyl's heyday. In the early '90s, those shipments dropped to around 12,000, but hipsters have surged cartridge sales back up to 60,000 units in recent years.