Showing customers who have never tried decent headphones the Sennheiser HD 598:
"Whoa! it feels like they are in the room with me!" - Sold
"They sound so clear, I just wish they had more bass" - Not Sold
"Why don't these cancel out any noise." - Definitely Not Sold
"I'd buy these if they didn't look so weird" - Not Sold, (didn't have 558s in stock)
Then I play "Virtual Haircut"(Binaural Dummy Head Recording) to some customers to demonstrate wide soundstage and great placement
"Whoa what?" *takes off headphones "You are screwing with me right?" - Amazed but Not Sold
"These would be great for games" - Sold
Got a coworker to buy a couple of the 558s after they heard my 598s, of course we tried the 558s as well.