If you want really good sound, get an iPod Touch or an iPod Classic, and get a pair of good in-ear headphone like the Shure SE310 or SE510; and you will be in heaven.
BTW, don't forget to rip your CDs in Apple Lossless, or at least 320bps MP3 or 320bps AAC.
BTW, don't forget to rip your CDs in Apple Lossless, or at least 320bps MP3 or 320bps AAC.