Headphones and Sound Quality

I don't know if any readers ever listen to an iPod at home, but surprisingly an iPod can actually drive some brands of audiophile headphones. I have a pair of AKG 501 headphones and the difference in sound from the stock headphones is spectacular when doing an A/B test. For anyone who spends much time listening to an iPod-type device at home, test it out. It is difficult to go back to the stock headphones after trying out a pair of AKG or Grado headphones, which generally run from $50 to $500, with the best values in the $50 to $150 range.