I have the Phiaton MS500s and a Fiio E11 headphone amp and couldn't be happier. Works great for hotel rooms. The MS500s are apparently discontinued, so you can probably pick up a great deal on Amazon or Ebay. List was $300.
If you use an iPhone(iPod) with the E11, pick up the Fiio line-out cable too. Plugs into the iPhone 4 30-pin connector and grabs the signal just after the D/A before the not-so-good iPhone amp.
If you use an iPhone(iPod) with the E11, pick up the Fiio line-out cable too. Plugs into the iPhone 4 30-pin connector and grabs the signal just after the D/A before the not-so-good iPhone amp.