I am going to buy a portable headphone amp in the next few weeks. Something Like Ray Samuel's SR-71A or TJ Millet's tube amp. I have been hunting music players online and the pickings are meager. I don't want an Ipod or Zune or Sansa. I am looking for a beast with great sound quality. Doesn't matter if it runs a compact disc format or has a micro-drive or runs off memory stick. Any help please? If it has line out connection that's a bonus. Thanks.