I did indeed... the HiFiMAN HE-500. And what a wonderful, smooth transaction it was! At that time, I only had Beats headphones (Studio 2013, Studio 2013 Wireless, and Pro), the Sennhesier HD 598, and the Parrot Zik. Oh, and the Shure SE535 (bronze) IEM, which was my virgin used headphone purchase, from imackler right here on this board and gotten earlier that same month (May of last year).
That HiFiMan HE-500 was the door opener to wonderful head-fi. It had not only fast treble sparkle, but palpable precise bass... and everything in between. It has been and still is the ONLY over-hear headphone that I have that does both so strongly... not the Sennheiser HD 800, not the Grado PS1000 or Grado HP1000, not the Beyerdynamic T 5 p.... only the HiFiMAN HE-500. (There are two of my IEMS that do... the AKG 3003 and the T-PEOS H200).
Haha... I was the introduction to your gateway drug!
Funny, I bought a pair the HE-500's again recently. Saw Amazon's stock dwindling and I couldn't resist. I love the comfort of the 400i / 560's, but neither can touch the 500's sound signature imho. Oh what I would give for the a Hifiman with the HE-500's sound and the 400 / 560's comfort...